Finish Selecting Your Vehicle to Shop For Your Timing Cover

Choose a Year for your GMC 's Timing Cover

  • 2019
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013
  • 2012
  • 2011
  • 2010
  • 2009
  • 2008
  • 2007
  • 2006
  • 2005
  • 2004
  • 2003
  • 2002
  • 2001
  • 2000
  • 1999
  • 1998
  • 1997
  • 1996
  • 1995
  • 1994
  • 1993
  • 1992
  • 1991
  • 1990
  • 1989
  • 1988
  • 1987
  • 1986
  • 1985
  • 1984
  • 1983
  • 1982
  • 1981
  • 1980
  • 1979
  • 1978
  • 1977
  • 1976
  • 1975
  • 1974
  • 1973
  • 1972
  • 1971
  • 1970
  • 1969
  • 1968
  • 1967
Show More Years

Shop By Brand

The Following brands are available based on your search.

  • ATP
    ATP
  • Cloyes
    Cloyes
  • Dorman
    Dorman
  • Genuine
    Genuine
  • K&N
    K&N
  • Pioneer Cable
    Pioneer Cable

Best Selling Genuine Gmc Timing Covers

  • We Stock the following top leading brands, including Dorman, ATP, Cloyes, Genuine
  • Constantly Updated Inventory of Gmc Replacement Timing Cover Parts

Dorman
1993 GMC C1500 Engine Timing Cover 8 Cyl 5.7L Dorman

P311-4DADAA7    635-505  New

500350 , 12523972 , 12562818 , 8125239730 , 12523973 , 8125583430 , 103076 , 500350WO , 500LS2 , 8100896710 , 12558343 , 12552427 , 103075 , 93800970

Qty:
38.75
Dorman Engine Timing Cover
  • ; w/Timing Indicator
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 11
    • Material: Plastic
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1993 - GMC C1500 V 8 Cyl 5.7L 350 -
Dorman
1990 GMC C2500 Engine Timing Cover Dorman

P311-4DADAA7    635-505  New

500350 , 12523972 , 12562818 , 8125239730 , 12523973 , 8125583430 , 103076 , 500350WO , 500LS2 , 8100896710 , 12558343 , 12552427 , 103075 , 93800970

Qty:
38.75
Dorman Engine Timing Cover
  • ; w/Timing Indicator V8 350CID 5.7L (5736cc)
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 11
    • Material: Plastic
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle
1990 - GMC C2500
Dorman
2001 GMC W3500 Forward Engine Timing Cover 8 Cyl 5.7L Dorman

P311-4DADAA7    635-505  New

500350 , 12523972 , 12562818 , 8125239730 , 12523973 , 8125583430 , 103076 , 500350WO , 500LS2 , 8100896710 , 12558343 , 12552427 , 103075 , 93800970

Qty:
38.75
Dorman Engine Timing Cover
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 11
    • Material: Plastic
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Fuel Type Block Engine CID CC
2001 - GMC W3500 Forward GAS V 8 Cyl 5.7L 350 -
Dorman
1985 GMC C1500 Suburban Engine Timing Cover 8 Cyl 5.0L Dorman

P311-27C1AEC    635-509  New

12523974 , 500305S

Qty:
29.30
Dorman Engine Timing Cover
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 11
    • Material: Steel
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1985 - GMC C1500 Suburban V 8 Cyl 5.0L 305 -
Dorman
1990 GMC K1500 Engine Timing Cover 6 Cyl 4.3L Dorman

P311-248DC4B    635-512  New

103122 , 12513961 , 500262S

Qty:
33.00
Dorman Engine Timing Cover
  • ; w/Welded Pointer
  • Product Attributes:
    • Color/Finish: Silver
    • Grade Type: Regular
    • Length: 12.25
    • Material: Steel
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1990 - GMC K1500 V 6 Cyl 4.3L 262 -
Dorman
2009 GMC Yukon Engine Timing Cover 8 Cyl 5.3L Dorman

P311-147257E    635-515  New

500LS2 , 103359 , 12600326

Qty:
97.47
Dorman Engine Timing Cover
  • Product Attributes:
    • Color/Finish: Silver
    • Grade Type: Regular
    • Length: 13
    • Material: Aluminum
    • Mounting Hardware Included: No
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
2009 - GMC Yukon V 8 Cyl 5.3L 325 5328
Dorman
1995 GMC Safari Engine Timing Cover 6 Cyl 4.3L Dorman

P311-13DB58D    635-502  New

89017259 , 103074 , 12554555 , 89017261 , 12591746 , 93445880 , 500262 , 103073 , 10077964 , 12554557

Qty:
41.96
Dorman Engine Timing Cover
  • ; Plastic
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 12.75
    • Material: Plastic
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1995 - GMC Safari V 6 Cyl 4.3L 262 -
Dorman
1995 GMC C1500 Engine Timing Cover 6 Cyl 4.3L Dorman

P311-13DB58D    635-502  New

89017259 , 103074 , 12554555 , 89017261 , 12591746 , 93445880 , 500262 , 103073 , 10077964 , 12554557

Qty:
41.96
Dorman Engine Timing Cover
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 12.75
    • Material: Plastic
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1995 - GMC C1500 V 6 Cyl 4.3L 262 -
Dorman
1995 GMC Sonoma Engine Timing Cover 6 Cyl 4.3L Dorman

P311-13DB58D    635-502  New

89017259 , 103074 , 12554555 , 89017261 , 12591746 , 93445880 , 500262 , 103073 , 10077964 , 12554557

Qty:
41.96
Dorman Engine Timing Cover
  • ; Plastic wo/Hole for Sensor
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 12.75
    • Material: Plastic
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Engine VIN Block Engine CID CC
1995 - GMC Sonoma W V 6 Cyl 4.3L 262 -
Dorman
1979 GMC C1500 Engine Timing Cover 8 Cyl 5.7L Dorman

P311-53FDD4C    635-510  New

500350s , 103120 , 12531283 , 12552426 , 462846

Qty:
26.06
Dorman Engine Timing Cover
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 11
    • Material: Steel
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1979 - GMC C1500 V 8 Cyl 5.7L 350 -
Dorman
1983 GMC P3500 Engine Timing Cover 8 Cyl 5.7L Dorman

P311-53FDD4C    635-510  New

500350s , 103120 , 12531283 , 12552426 , 462846

Qty:
26.06
Dorman Engine Timing Cover
  • ; wo/Motorhome Chassis
  • Product Attributes:
    • Color/Finish: Black
    • Grade Type: Regular
    • Length: 11
    • Material: Steel
    • Mounting Hardware Included: Yes
Brand: Dorman
Additional Fitment Information:
Vehicle Block Engine CID CC
1983 - GMC P3500 V 8 Cyl 5.7L 350 -
ATP
1996 GMC Savana 1500 Engine Timing Cover 6 Cyl 4.3L ATP

P311-4946E83    103073  New

2670009 , TW6509 , 500262 , 89017259 , 308434 , 103073 , 635502 , 12554555

Qty:
43.79
ATP Engine Timing Cover
  • ATP Engine Timing Cover
  • ; Contains Crankshaft Sensor Hole Plastic
  • Product Attributes:
    • LineCode: Atp2
  • The timing cover is a critical part of the engine. It allows proper lubrication of the timing chain protecting it from damage. Timing covers can become damaged from corrosion or over tightening. When this happens engine oil can leak resulting significant engine damage. ATP timing covers fit and function just like the original part ensuring long life and durability.
Brand: ATP
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - GMC Savana 1500 V 6 Cyl 4.3L 262 -
Cloyes
1967 GMC C15/C1500 Pickup Engine Timing Cover 8 Cyl 5.3L Cloyes - QUICK BUTTON Two-Piece Timing Cover

P311-01B5A7F    9-221  New

9221

Qty:
162.92
Cloyes Engine Timing Cover
  • Quick Button Two-piece Timing Cover
  • ; Standard Engine
  • High Performance
  • QUICK BUTTON Two-Piece Timing Cover
  • QUICK BUTTON Aluminum Two-Piece Timing Cover for Most Timing Chain Systems (Excluding QUICK ADJUST). Includes Fully Rollerized Endplay Adjustable Cam Button. A Perfect Compliment to Your HEX-A-JUST Timing Set for Easy Access Camshaft Timing Adjustments.
Brand: Cloyes
Additional Fitment Information:
Vehicle Block Engine CID CC
1967 - GMC C15/C1500 Pickup V 8 Cyl 5.3L 327 5358
Cloyes
1969 GMC C15/C1500 Pickup Engine Timing Cover 8 Cyl 6.5L Cloyes - QUICK BUTTON Two-Piece Timing Cover Button Repair Kit

P311-526B2C7    9-221D  New

9221D

Qty:
27.18
Cloyes Engine Timing Cover
  • Engine Timing Cover
  • High Performance
  • QUICK BUTTON Two-Piece Timing Cover Button Repair Kit
  • QUICK BUTTON Two-Piece Timing Cover Replacement Kit; Includes all the Required Cap Screws, O-Ring and Rollerized Button; Meets or exceeds OEM performance requirements; Cloyes utilizes the latest in design and material technology, ensuring quiet and maintenance-free experience.
Brand: Cloyes
Additional Fitment Information:
Vehicle Block Engine CID CC
1969 - GMC C15/C1500 Pickup V 8 Cyl 6.5L 396 -
Cloyes
1974 GMC C15/C1500 Pickup Engine Timing Cover 8 Cyl 7.4L Cloyes - Quick Button Two-Piece Timing Cover

P311-57DEEF1    9-231  New

9231

Qty:
195.23
Cloyes Engine Timing Cover
  • Engine Timing Cover
  • High Performance
  • Quick Button Two-Piece Timing Cover
  • Quick Button Aluminum Two-Piece Timing Cover for Most Timing Chain Systems (Excluding Quick Adjust). Includes Fully Rollerized Endplay Adjustable Cam Button. A Pefect Compliment to Your Hex-A-Just Timing Set for Easy Access Camshaft Timing Adjustments.
Brand: Cloyes
Additional Fitment Information:
Vehicle Block Engine CID CC
1974 - GMC C15/C1500 Pickup V 8 Cyl 7.4L 454 7441
Cloyes
1972 GMC C15/C1500 Suburban Engine Timing Cover - Center 8 Cyl 6.6L Cloyes - Quick Button Two-Piece Timing Cover

P311-57DEEF1    9-231  New

9231

Qty:
195.23
Cloyes Engine Timing Cover  Center
  • Engine Timing Cover
  • High Performance
  • Quick Button Two-Piece Timing Cover
  • Quick Button Aluminum Two-Piece Timing Cover for Most Timing Chain Systems (Excluding Quick Adjust). Includes Fully Rollerized Endplay Adjustable Cam Button. A Pefect Compliment to Your Hex-A-Just Timing Set for Easy Access Camshaft Timing Adjustments.
Brand: Cloyes
Position: Center
Additional Fitment Information:
Vehicle Position Block Engine CID CC
1972 - GMC C15/C1500 Suburban Center V 8 Cyl 6.6L 402 6588
Genuine
2009 GMC Canyon Engine Timing Cover 5 Cyl 3.7L Genuine

P311-2600F43    W0133-2009900  New

Qty:
283.20
Genuine Engine Timing Cover
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Oil Pump and Timing Cover Assembly
Brand: Genuine
Additional Fitment Information:
Vehicle Block Engine CID CC
2009 - GMC Canyon L 5 Cyl 3.7L 223 3654
Cloyes
1984 GMC C1500 Suburban Engine Timing Cover 8 Cyl 5.7L Cloyes - QUICK BUTTON Two-Piece Timing Cover, Engine with 0.391" Raised Cam

P311-2251410    9-226  New

9226

Qty:
181.58
Cloyes Engine Timing Cover
  • Engine Timing Cover
  • ; Engine with 0.391" Raised Cam
  • High Performance
  • QUICK BUTTON Two-Piece Timing Cover, Engine with 0.391" Raised Cam
  • QUICK BUTTON Aluminum Two-Piece Timing Cover for Most Timing Chain Systems (Excluding QUICK ADJUST). Includes Fully Rollerized Endplay Adjustable Cam Button. A Perfect Compliment to Your HEX-A-JUST Timing Set for Easy Access Camshaft Timing Adjustments.
Brand: Cloyes
Additional Fitment Information:
Vehicle Block Engine CID CC
1984 - GMC C1500 Suburban V 8 Cyl 5.7L 350 -
Cloyes
1972 GMC C35/C3500 Pickup Engine Timing Cover 8 Cyl 5.0L Cloyes - QUICK BUTTON Two-Piece Timing Cover, Engine with Big Block Crankshaft Snout

P311-2AB9CEE    9-227  New

9227

Qty:
181.58
Cloyes Engine Timing Cover
  • Engine Timing Cover
  • ; Engine With Big Block Crankshaft Snout.
  • High Performance
  • QUICK BUTTON Two-Piece Timing Cover, Engine with Big Block Crankshaft Snout
  • QUICK BUTTON Aluminum Two-Piece Timing Cover for Most Timing Chain Systems (Excluding QUICK ADJUST). Includes Fully Rollerized Endplay Adjustable Cam Button. A Perfect Compliment to Your HEX-A-JUST Timing Set for Easy Access Camshaft Timing Adjustments.
Brand: Cloyes
Additional Fitment Information:
Vehicle Block Engine CID CC
1972 - GMC C35/C3500 Pickup V 8 Cyl 5.0L 307 5031
Cloyes
1973 GMC K25/K2500 Suburban Engine Timing Cover 8 Cyl 5.0L Cloyes - QUICK BUTTON Two-Piece Timing Cover, with 0.391" Raised Cam & BBC Crank Snout

P311-3AE7DC9    9-229  New

9229

Qty:
181.58
Cloyes Engine Timing Cover
  • Engine Timing Cover
  • ; Engine with 0.391" Raised Cam & BBC Crank Snout
  • High Performance
  • QUICK BUTTON Two-Piece Timing Cover, with 0.391" Raised Cam & BBC Crank Snout
  • QUICK BUTTON Aluminum Two-Piece Timing Cover for Most Timing Chain Systems (Excluding QUICK ADJUST). Includes Fully Rollerized Endplay Adjustable Cam Button. A Perfect Compliment to Your HEX-A-JUST Timing Set for Easy Access Camshaft Timing Adjustments.
Brand: Cloyes
Additional Fitment Information:
Vehicle Block Engine CID CC
1973 - GMC K25/K2500 Suburban V 8 Cyl 5.0L 307 5031

Latest Car Advice

CarJunky AutoAdvice

installing timing chain cover gasket

Showing 3 out of 3 Posts
Question From gompers on installing timing chain cover gasket

need instructions on installing timing chain cover gasket on a 1982 gmc 305 cu.in. engine. also is it best to replace the water pump since I have to take it off to get to the timing cover? and is there a way to take the timing cover off without taking the oil pan off too? also need to set the quadrajet carb, check timing too. need instructions on this also. thanks!

Response From DanD Top Rated Answer

Getting the cover off isn’t an issue; getting it back on, with the oil pan in place can be quite the challenge.
I’ve got away with removing the front three pan bolts on either side of the pan. Then jam wedges between the pan and block; yes it slightly bends the pan, but it gives you just that little extra space you need to slip the corners of the timing cover, under the lip of the block.
Reuse the old rubber seal (if not torn) that runs around the bottom of the cover; the new seal that has never been compressed, is just too thick to squeeze back under the lip of the block and oil pan.
Have lots of silicone and goop the crap out of all the mating surfaces and you may get lucky and it not leak like Niagara Falls.
So yes it can be gone; but the proper way is to remove the pan and install all new gaskets.
Checking timing; hopefully you still have the emissions decal with the timing spec and procedure stuck somewhere under the hood. There were so many different spec’s back then; along with procedures, it’s anyone’s guess. If not; stick it around 4 degrees BTDC with the vacuum advance disconnected; that will get it close enough and likely not hurt anything due to detonation.
As for adjusting the quad; I could give you the text book description, but that was intended for a perfectly running engine with a spotless new carb.
Sorry but there’s no way that an 82 305cu” with even a rebuilt carb will run worth crap using text book settings.
This is where experience comes in when dealing with carbs; you more or less set it by feel, for what the engine wants; if you’re not concerned with emission’s regulations.
Me trying to explain this setting procedure at a key board; would be like trying to explain how to tie your shoe laces; if you’ve never done it before.
You make two bunny ears, with both of the ends of the lace; then you; well you get the idea; almost impossible. You can't teach a feeling or explain it; you must remember the first time; never mind this is a fmaily forum; you get the idea, right? LOL
Good luck and keep it fun.

Dan.

Response From Hammer Time

If the pump has some mileage on it, i would change it.

You don't have to pull the pan, just remove the bolts in the front and use some black silicone in the corners when you put the cover back on. Use a razor blade the trim the gasket even with the edge of the block.

'88 gmc Safari 4.3 no start ?????

Showing 2 out of 14 Posts | Show 12 Hidden Posts
Question From sparky62 on '88 gmc Safari 4.3 no start ?????

Howdy,
Nice forum, I have been able to glean much in the past and never 'needed' to sign up.
So Hello.

Anyway,
I have a '88 GMC Safari van with about 80k on a gm crate engine although it was installed in '96 I have had very few issues with this truck and it regularly gets 26 mpg.
I let it sit recently for about 3 month which has never been an issue in the past except for a low battery. It is a spare work truck.
Went to start it and no joy. Had fuel squirting from the injectors, TBI, had spark at the plugs, so silly me I figured it was time for a timing set.
Got the new t-set installed and tried to start it prior to buttoning things up and still no start.
Plugs look fine, NGK's that are only a year or so old, no spark crossover, not even response when I disconnect the injectors and try starting fluid.

I'm kinda at a loss here, and I've been working on my own rigs for 32 years now, kinda feeling dumb.

Help......

Response From Discretesignals

Have you run a compression test?

Response From sparky62

that is the next thing I was going to do on all cyl's, #3 seemed fine though and it sounds the same as it always has when I turn it over.
Plugs are soo easy to pull on those things ;)

I should add that the truck did kinda try to start before I did the t-set, it would stumble, spit, sputter, but never 'catch' except for a few times that it tried to run for a few seconds.

Sorry for the incomplete info.
jeff

Response From Discretesignals

You should run a compression test (on a fully charged battery and strong starting system) just to be sure that isn't causing a problem. Let us know what your results are.

Response From sparky62

will do

Response From sparky62

All cyl's are around 120psi give or take, kinda hard to hold the compression tester tight and work the starter by yourself but they're pretty close.

Response From Discretesignals Top Rated Answer

The compression reading is somewhat low. That's unless there is something up with your gauge. When you pulled the timing cover was the old timing chain really sloppy or had jumped? Have you had the distributor out?

Response From sparky62

I have a small split in the boot on my tester and had some blow by.

Have had the cap off, there was a small amount of corrosion on the plug tabs, cleaned it off no real scoring, it is a fairly new cap.
the spark jumps from the coil hv post to the core when i remove the lead.
at the plugs there is nice bright spark.

J

Response From Discretesignals

Did you test all the spark plugs for a nice fat spark?

If you have injector pulse and spark that means the ignition module is working and the ECM is getting signal from the ignition module to fire the injectors. You sprayed it with starting fluid, so it should run. You have a good one. The only thing that I can think of is the distributor not indexed right or you have some plug wires switched around.




Response From sparky62

all the plugs had good spark and none of the wires have been off more than one at a time during this whole thing.
see why I'm kinda perplexed.

Though,
I was thinking over dinner,
although the rotor is turning and spark is bright at the plugs, if the roll pin holding the dist drive gear got partially or completely sheared and it is just turning by being bound by the stuck piece.
I havent brought it to #1 tdc either to check but will do that and pull the dist and check the gear.

Response From Discretesignals

Roll pin shears and you won't have any oil pressure either. You can tell by grabbing the rotor and attempting to spin it.

Response From sparky62

Yup
Realized that after I opened my mouth.

Indexed to #1 tdc and rotor was right.

Went back through and checked fire at the individual plugs and 2 were now showing ok fire and the others not.
Looks like enough wet got up around the insulator to short them out cause when i would pull it away from the manifold where it was grounded there would be good fire from the plug body to the block.
Changed 3 of the 4 since thats what I had and it fired and runs, needs adjusting a bit and brand new plugs, but should be ok now.
The old timing set was worn, has a lot of slap in the chain and worn sprockets.

Thank you,
j

Response From Discretesignals

Seems the mystery is solved.

Response From sparky62

The plugs were wet with fuel when i pulled them,
And our outside air temp is in the 30's,
Could it be flooded and not clearing?
though i disconnected the injectors and hit it with starting fluid to no avail.