1991 Chevrolet Blazer Service and Repair Manual

This factory service and repair manual for the 1991 Chevrolet Blazer carries two overhead-valve V8s for one two-door sport utility: a 379-cubic-inch 6.2-liter diesel and a 350-cubic-inch 5.7-liter gasoline engine, neither of them force-fed. Scottsdale and Silverado are the two trims. What makes the book worth having on a truck this age is less the trim content than the depth of the chassis material — axle, driveline, brake and steering specifications, torque figures and wiring diagrams that a general repair guide condenses away.

Engines covered

• 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
• 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 2-door sport utility

Trims covered

• Scottsdale
• Silverado

Known issues on the 1991 Blazer. Seven recalls are on the federal record. One is a braking fault: the switch that tells the antilock system whether the truck is in two- or four-wheel drive can misread, stretching stopping distances during an antilock stop. Another has the fuel tank sender seal sitting out of position, so a rollover can spill more fuel than the standard allows. A third lets a rear belt buckle shift inside its cover until the release button jams down and the belt will not latch at all. Brakes dominate the 245 complaints with 131, ahead of seat belts at 26 and electrical at 15.