GMT800 (1999-2006, plus 2007 Silverado Classic / Sierra Classic)
Key reference: GM 15033286 (key blank)
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Diagnostic port location (OBD)
Illustrative — for orientation only.
LHD (US market only): under the lower edge of the dash on the driver's side, just left of the steering column, facing down into the driver's footwell above the pedals. On 1999-2002 trucks it sits on the left lower dash directly below the column. On 2003-2006 and 2007 Classic trucks (revised dash) it sits at the lower left of the dash next to the end-of-dash fuse block and the BCM connectors. Same position on regular, extended and crew cab and on all trims, including Sierra Denali.
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