1991 Chevrolet S10 Blazer Service and Repair Manual

This factory service and repair manual for the 1991 Chevrolet S10 Blazer covers two bodies, a four-door sport utility and a two-door, and four trims: Base, Nevada, Tahoe and Tahoe LT. Two overhead-valve V6 engines are documented, a 3.1-liter and the 4.3-liter of 262 cubic inches, both naturally aspirated on gasoline. The second pair of doors changes more than it looks: latch, glass, seal and wiring routing all differ, and the body and electrical sections handle each configuration separately.

Engines covered

• 3.1L V6 — OHV, naturally aspirated, gasoline
• 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door sport utility
• 2-door sport utility

Trims covered

• Base
• Nevada
• Tahoe
• Tahoe LT

Known issues on the 1991 S10 Blazer. The 1991 Blazer carries 233 owner complaints, and brakes take 78 of them, ahead of 26 on the engine and cooling system and 21 on seat belts. Brake diagnosis is where the manual gets used hardest for this year: hydraulic testing, master cylinder and valve checks, lining and rotor wear limits, bleeding sequences and the torque values for every fastener involved. Cooling system pressure testing and belt anchorage procedures cover the two smaller clusters with the same level of specification.