Miscellaneous Pcm/VCM Controls: Notes

WARNING: This page is about a different car, the 1998 GMC Pickup, 1998 GMC Cab & Chassis, 1998 Chevrolet Pickup, and 1998 Chevrolet Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Although not considered true engine performance-related systems, some controlled devices may affect driveability if they malfunction.

NOTE: Manufacturer does not supply many individual component tests. For component tests that are not listed, perform appropriate DTC test. See TROUBLE CODE DEFINITION table. in TESTS W/CODES - 6.5L DIESEL article.