Chevy Trailblazer: P0171 and P0174 Diagnosis | Drivetrain Resource

PHILTOP UF271 Ignition Coil Pack, Square Set of 8 Compatible with Suburban 2500 Tahoe 2002-2006, Trailblazer EXT 2003-2004, Yukon, Yukon XL 2500 2000-2006, Escalade EXT 2002-2006, 6.0L 5.3L 8.1L 6.0L

Detroit Axle - Front & Rear Struts + Sway Bars Replacement for 2002-2003 Chevrolet Trailblazer EXT GMC Envoy XL - 8pc Set

BDFHYK E3549M Electric Fuel pump module assembly Compatible with 2003-2005 Buick Rainier/Chevrolet SSR/Chevrolet Trailblazer/Chevrolet Trailblazer EXT/GMC Envoy/GMC Envoy XL 4.2L l6 5.3L V8

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Check Engine Light is On: 2002 Chevrolet Trailblazer LT 4.2L 6 Cyl.

Check Engine Light is On: 2003 Chevrolet Trailblazer EXT LT 4.2L 6 Cyl.