11129-B | PML Covers GM AAM 9.5/9.76 12 Bolt Rear Differential Cover For Chevrolet Silverado 1500 / GMC Sierra 1500 | Black Powder Coat Finish

For 2014 to 2018 and some 2019 and newer Chevrolet Silverado 1500 and GMC Sierra 1500 and trucks, vans and SUVs. May also work on some Titan trucks. Cover includes magnetic drain plug and mounting hardware.

Volume: 

0.6 quarts over stock, approximately

Number of Bolts: 

12

PML designed this rear differential cover for 2014 and newer Chevy Silverado and GMC Sierra 1500 trucks, vans and SUVs. See the APPLICATIONS section for fitment information.

Benefits

• Heavy duty construction
• Extra capacity
• Fins for cooling
• Drain hole and magnetic drain plug for easy servicing
• New mounting bolts included
• Works with Duragrip and similar aftermarket carriers when changing to 4.10 or deeper gears, no spacer needed

This PML 12 bolt GM AAM differential cover is designed to replace the stock cover. Examples of vehicles that commonly have used this differential cover:

• 2014 to 2018, some 2019 and newer, Silverado 1500 (2019 and newer may have the newer GM 9.5 axle, see PML part number 11172)
• 2014 to 2018, some 2019 and newer, Sierra 1500 (2019 and newer may have the newer GM 9.5 axle, see PML part number 11172)
• 2014 to 2018, some 2019 and newer, GMC/Chevy SUVs (modifications needed for Escalade, Suburban, Tahoe, Yukon!)
• 2018 and newer Express and Savana Vans (check for clearance)
• 2017 and newer Titan trucks with a 12 bolt differential (requires customer to modify support for the brake line, not recommended or supported by PML)

Always check your vehicle to verify configuration and clearance. Configurations vary.

GM OEM gasket: The GM OEM part number for the gasket that corresponds to this cover is 22943110.

Aftermarket Carriers: Cover works without spacer with Duragrip and many aftermarket carriers, which are required when changing to 4.10 or deeper gears. See Installations for an example.

Installation Note: Bracket for parking brake cable probably needs to be slightly moved or bent.

Sway and Pan Hard Bars on SUVs (Escalade, Suburban, Tahoe, Yukon) and Similar:

• 2014 and newer Escalade, Suburban, Tahoe, and Yukon usually have a sway bar behind the stock cover that is very close to the stock differential cover.
• This PML cover hass been modified to fit. Material off the top fins and sometimes the cover surface needed removing. PML cannot guarantee fitment. There are some pictures from Tahoes in the INSTALLATIONS section.
• If vehicle is lifted or has aftermarket sway or panhard bars, this cover may fit without modification.

2019 and newer models: May use a similar 12 bolt rear cover that is slightly larger and not compatible with this cover. To figure out which you have, try checking the OEM gasket part number or visually comparing your cover to the pictures below.

• To check gasket part number:
  Find out (call dealer, look on line) for the OEM gasket part number.
  This PML differential cover, part number 11129, works with gasket GM AC Delco part number 22943110.
• To check visually look near the fill/level check hole.

Tow Package: Trucks with the optional tow package usually include the 9.76 inch ring gear differential. These cover is the same.

Included With Cover

PML includes a magnetic drain plug, new mounting bolts, and a fill hole plug with each cover.

Drain is on the bottom of the cover for easy servicing. Fill/level check hole is on the side, at the 3 o'clock position and is at the same level as the stock cover for accurate fluid levels.

Optional Temperature Sensor Machining

This differential cover has an undrilled boss for an aftermarket temperature sending unit. Optionally, PML can drill and tap a 1/8 NPT hole. The boss is located on the side below the fill hole.