GM Differential Covers - PML - 10303-2 - GM 9-1/2" Ring Gear, 14 Bolt Cover for Hummer H2 -
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GM 9-1/2" Ring Gear, 14 Bolt Cover for Hummer H2 6

 
Part Number: 10303-2
 Racer Net: $195.00/Each
 Our Price: $190.95
 You Save: $4.05/Each (2%)

This differential cover fits the rear end on Hummer H2, Trailblazer SS, SSR 6 speed, and other Chevy and GMC trucks, vans and SUVs with the 9-1/2 inch 14 bolt rear differential. PML makes three covers for the GM 9-1/2 rear differential and designed this cover for Hummer H2s and similar vehicles that have less space or clearance issues but still want the benefits of an aftermarket cover.

See all PML GM 9-1/2 differential covers.

If you do not have an H2 and wish to order this cover, you will need to select what bolt size you have. Please see the Bolt size selection below.
For the Hummer H2, the stock bolts are metric 8-1.25x21 mm.

Bolt Information

PML includes mounting bolts with all differential covers. PML provides bolts that are longer than the stock bolts since the flange on PML's cover is much thicker than stock. The bolts with the stock cover will not work.

GM has used four different bolts on these differentials so to complete your order, we need to know which bolts you have. These differentials have used both metric and standard cover bolts. The bolt length has not been consistent either. When ordering one of these covers, you will need to pull one of your stock bolts out (a top bolt is best) and measure the length and determine whether it is metric or standard.

  • Bolt length is measured from the underside of the head (where a washer would sit) to the tip. If the bolts are metric, the length will be 21mm or 16mm. If the bolt is standard, the length will be 5/8 inch or 7/8 inch.
  • Metric bolts will have 20 threads per inch, standard ones will have 18. Also, a bolt head with lines or letters on it is typically standard. A bolt with numbers such as 5.8, 9.8, 10.9, or 12.9 is likely to be metric.

We know this is a hassle, but we do not want to send the wrong bolts or charge everyone a lot of extra money to cover sending all possible bolts with each cover.

PML Differential Cover Compared to Stock

PML Differential Cover Part Number 10303-2 height compared to stock
Click on image to view larger.

PML Differential Cover Part Number 10303-2, compared to stock
Click on image to view larger.

These images show this PML differential cover compared to the stock cover.

PML Differential Cover Features:

  • Increased oil capacity for cooler temperatures
  • Sand-cast aluminum with raised fins
  • 3/16-inch thick wall construction to add strength to differential housing
  • 3/8-inch thick gasket flange will not bend when bolts are tightened
  • Machined gasket surface for a secure seal using RTV or factory reusable gasket
  • Oil changes without removing the cover
  • All hardware provided, including magnetic drain plug

Volume: 0.5 quart over stock

Dimensions: Click here for dimensions.

Options:
Finish:
Bolt Size:
Product Notes:
6. This Product requires a signature for delivery from UPS.
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Product Notes:
6. This Product requires a signature for delivery from UPS.
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