This Differential Cover fits:
C10 & K10 1/2 Ton Truck 1979 to current
C1500 & K1500 1/2 Ton Truck 1979 to current
Silverado 1500 & Sierra 1500 1/2 Ton Truck 1979 to current
C20 K20 3/4Ton Truck 1979 to 1998
C2500 & K2500 3/4Ton Truck 1979 to 1998
Vandura, Express, Savana and G1500 1/2 Ton
Vans 1979 to current
Vandura, Express, Savana and G2500 3/4 Ton
Vans 1979 to current
Full size Blazer & GMC Jimmy 1982 to 19994
Avalanche 1500
Tahoe & Yukon 1992 to current
Suburban 1500 1979 to current
Hummer H3
VERIFY THAT ANY OF THE ABOVE IS EQUIPPED
W/ 8-1/2" OR 8-5/8" RING GEAR 10 BOLT AXLE
BEFORE YOU ORDER:
Verify which axle your vehicle was assembled with. Look for:
Tags and or specifications in the glove box.
You can call your vehicles Dealer with the VIN number.
Your mechanic may be able to help.
View the reference drawing for the cover that you intend to order.
The reference drawings are listed in the Vehicle sub-categories.
View the drawing and check for interferences.
Most brackets that are attached using one of
the cover bolts will generally not be a problem.
This cover NDC508-A could fit many GM vehicles.
Many of the listed vehicles were also built with a 7-1/2" 10 Bolt
or a 9-1/2" 14 Bolt axle.
GM Bolt issues
GM installed the stock covers on this axle using different bolt diameters. You will need to specify which bolts are used on your vehicle so that we can ship the correct ones with your new cover.
The bolts used are:
8mm diameter (.315)
3/8" diameter (.375)
Bolt head markings 5.8, 9.8, 10.9, or 12.9 indicate a metric bolt.
Pull
a top bolt out. Use a 8mm open end wrench to check the diameter of the
threaded area. If it fits with only a very small amount of clearance
it is a an 8mm bolt.
If the wrench won't go on the threaded area the
bolt should be a 3/8 standard thread. You could check with a 3/8" open
end wrench.
There are 2 lengths for the Metric and 2 Lengths for the Standard bolts.
Metrics are 16 mm (0.629") or 21mm (0.827") you can measure in inches shown in ().
Standards are 5/8" (0.625") or 7/8" (0.875")
Confirm one of the following:
Short Standard 3/8" x 5/8" LG
Short Metric 8mm x 16mm LG
Long Standard 3/8" x 7/8" LG
Long Metric 8mm x 21mm LG
Select appropriate bolt in the Options Section.
