Engine Block-Front View

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Engine Block-Front View - Thread Repair

Courtesy of GENERAL MOTORS CORP.

Fig 2: Thread Repair Specifications Index - Engine Block-Front

Courtesy of GENERAL MOTORS CORP.