A/B Solenoid Bracket Inspection
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, 2003 Chevrolet Cab & Chassis Silverado, and 2002 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
Measure angle between surfaces of A/B solenoid bracket (angle "A"). See Fig 1. If necessary, adjust bracket surfaces until angle between surfaces is 82.84 degrees. If angle cannot be properly adjusted, replace A/B solenoid bracket.