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GM OBD Trouble Codes
Note: See this page for generic OBD-II codes (they start with P0XXX).
See also: Chevrolet OBD-II Codes section
Introduction
GM cars and light trucks use SAE J1850 VPW (Variable Pulse Width Modulation). There are some variations among imports such as the Cadillac Catera, which is a German Opel derivative, the Catera uses the European ISO 9141 protocol.
The codes here are generally apply to all OBD-II GM vehicles: GMC, Chevrolet, Buick, Oldsmobile, Cadillac, Pontiac, Saturn.
Content
- GM Driving Cycle
- GM B Body Codes
- GM C Chassis Codes
- GM U Network Codes
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