2003 Chevrolet Suburban 2500 Service and Repair Manual

This factory service and repair manual for the 2003 Chevrolet Suburban 2500 documents a two-engine, two-trim year: the 6.0L overhead-valve V8 of 364 cubic inches and the 8.1L overhead-valve V8 of 496 cubic inches, both naturally aspirated on gasoline, in LS and LT versions of the four-door sport utility. A technician needs to know which V8 is in front of him before opening the specifications, because the two displacements are tabled separately throughout, while the driveline, chassis and body material applies to the truck whichever engine it left the plant with.

Engines covered

• 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline
• 8.1L V8 (496 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• LS
• LT

Known issues on the 2003 Suburban 2500. Owner complaints for this year number 21, a small total in which the service brakes take 13 of the entries, with a pair each against the power train and the electrical system. Brake service is therefore the likeliest reason to open this manual, and it gives the hydraulic overhaul procedures, bleeding sequence and pressure specifications for that work, then follows with automatic transmission and transfer case diagnostics and the wiring diagrams needed to trace an electrical fault back through its circuit to the connector that caused it.