Won't go up hill more than 15 mph

Asked by Aug 13, 2017 at 07:30 PM about the 2004 Chevrolet TrailBlazer EXT LT 4WD SUV

Question type: Maintenance & Repair

2004 trailblazer  won't go more than 15-20 mph up
any hill. It seems like it's working too hard and no
matter how hard you push on the pedal. Has
service engine soon light on. Changed coils, spark
plugs, map sensor, and camshaft sensor

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