Transmission Support Crossmember Replacement (2WD 1500/2500)

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Transmission Support Crossmember (2WD 1500/2500)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Support the transmission with a transmission jack.
1	Transmission Mount to Crossmember Nut (Qty: 2) NOTE: Refer to Fastener Notice . Tighten: 40 N.m (30 lb ft)
2	Transmission Crossmember Nut (Qty: 4) Tighten: 97 N.m (70 lb ft)
3	Transmission Crossmember Bolt (Qty: 4) Tip: Remove all traces of the original adhesive patch. Clean the threads of the bolt with denatured alcohol or equivalent and allow to dry. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488).
4	Transmission Crossmember