GM 9.5 14 Bolt With Clearance For H2, TBSS, SSR
Part Number 10303-2

Volume: 0.5 quart over stock

Dimensions: Click here for dimensions.

Number of Bolts: 14

PML makes three covers for the GM 9.5 inch ring gear, 14 bolt, differential.

PML designed this cover specifically for Hummer H2 and GMC/Chevy trucks and SUVs needing differential cover with a drain hole and plug and extra capacity while clearing pan hard and sway bars.

Benefits:

• 0.5 quart of extra fluid capacity
• Drain hole and magnetic drain plug to simplify maintenance
• 1/4 inch deeper than stock for sway and pan hard bar clearance
• Fins for heat dissipation
• Sand cast aluminum construction for thick walls
• Machined gasket flange for a secure seal
• Includes new hardware, M8&ndash1.25 mounting bolts, fill plug and magnetic drain plug

Bolts: This cover ships with bolts to replace the M8–1.25 x 21mm stock bolts. These are the correct bolts for Hummer H2, Trailblazer SS, SSR 6 speed, and most 2001 and newer vehicles. See Bolt Information in Specifications for more information.

Note: Vehicle configurations vary so always check your configuration and clearance before ordering.

This PML GM 9.5 cover usually fits behind the sway and pan hard bars on:

• Hummer H2, 2003 to 2009
• Trailblazer SS, 2006 to 2009
• SSR 6 speed, 2005 to 2006
• Some Cadillac SUVs, such as Escalade

To remove the stock cover and install the PML cover, the panhard bar will temporarily need to be dropped.

Many other GMC and Chevrolet trucks, SUVs, and vans have the GM 9.5 differential and may also be able to use this cover (see Bolt Information in Specifications):

• 1/2 Ton Trucks, 1988 to 2013:
  • C10 & K10
  • C1500 & K1500
  • Silverado 1500 & Sierra 1500
  • Silverado 1500 SS
  • Silverado 1500HD & Sierra 1500HD
• 3/4 Ton Trucks, 1979 to 2004:
  • Avalanche 2500
  • C20 & K20
  • C2500 & K2500
  • Silverado 2500 & Sierra 2500 (not HD)
• 3/4 Ton Vans, 1981 to 2013:
  • Vandura
  • Express
  • Savana
  • G2500
• 1 Ton Vans, 1982 to 1995:
  • Vandura
  • Savana
  • G3500
• SUVs such as:
  • Suburban 2500
  • Blazer K5

Vehicle configurations vary so always check your configuration and clearance before ordering. For each model and year there may be more than one rear axle possible. Check your stock cover shape and number of bolts. Check for space to spare tires, pan hard and sway bars, and similar, and see Installations for examples.

2014 and newer Silverado and Sierra 1500: please see PML GM 9.5 12 bolt cover.

Nissan Titan 2016 and newer: These trucks have a similar rear stock cover. See Titan 14 Bolt Rear Cover or Titan 12 Bolt Rear Cover.

Our thanks to those who have emailed us pictures of their installations.

• H2 Hummer


• 2009 Trailblazer SS
• 2008 Trailblazer SS
• 2006 Trailblazer SS


• 2007 Cadillac Escalade


• 2000 Silverado 2500

Note for installation: The sway bar and pan hard (track) bar may be in the way during installation. Plan on temporarily dropping or loosening these bars to swap out the stock cover for the PML cover.

H2 Hummer

Pictures are installations of this PML cover on three different H2 Hummers are below. The ones one the left and right are black powder coated and the one in the middle is polished. All have been customized with lift kits. The image on the right is courtesy of Scott who also installed and sent us a picture of PML's 4L65E transmission pan installed.

       

2009 Trailblazer SS

This PML differential cover and the PML 4L75E transmission pan were both installed on this 2009 Trailblazer SS.

     
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2008 Chevy Trailblazer SS

This PML rear differential cover was installed on a 2008 Chevy Trailblazer. The customer commented that the fit was great and it looked awesome as well!

PML Cover   PML Cover 2  
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2006 Trailblazer SS

     
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2007 Cadillac Escalade

Kirt installed this cover on his 2007 Cadillac Escalade 6.2L 2WD. He reported that the rear track bar needed to come off to get the cover on, but there is about 1/4 inch clearance when it is all back together. His Escalade uses the same bolts as the H2 (M8–1.25x21mm). Our thanks to Kirt for letting us know.

2000 Silverado 2500

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The image shows this PML 14 bolt 9.5 ring gear straight fin cover installed on a 2000 Silverado 2500 6.0 LS. This cover is in the natural as-cast finish.

Our thanks to Eugene (retired Marine) for sending us pictures of his installation and for his service to our country.

Bolt Information

This PML GM 9.5 differential covers ships with bolts to replace the M8–1.25x21mm stock bolts.

GM has used this differential since the late 1970s and has used four different bolts over the years.

All the Hummer H2, Trailblazer SS, SSR, and Escalade vehicles we have seen use M8–1.25x21mm stock bolts. Most 2001 and newer vehicles also use M8–1.25x21mm stock bolts. Other vehicles can use this cover but may need bolts with different threads.

See Guidelines for Bolt Sizes (click here), opens in new tab or window

Call PML at 310-671-4345 or email [email protected] if your stock bolts are NOT M8–1.25x21mm stock bolts.

Optional Temperature Sensor Machining

A boss on the side of the cover can be machined for a temperature sending unit. This boss is below the fill hole. Optionally, PML can drill and tap a 1/8 NPT hole. There is a machining charge for this.

Fill and Level Check

The fill hole is on the side of the cover at the same level as the stock cover. The level check hole is on the differential housing. Fill and check the fluid level with this PML cover just like with the stock cover.

Drain, Included With Cover

  
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Drain is on the bottom of the cover.

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

Inside of Cover

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Inside and out, cover follows the same general profile curve as the stock cover.

PML Differential Cover Compared to Stock

 
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This image compares the depth of all PML GM 9 1/2, 14 bolt differential covers and the stock cover. Click on image to view larger in a new tab or window.