lack of power on high end spark plugs
,wires ,coils ,injectors ,and throtle body have been changed still unable to pull a trailer
JA: How many miles are on the car? When did you last change the plugs?
Customer: 200,000 miles all was just changed with in 2 weeks
JA: What is the model/year of your Chevy?
Customer: 2004 chevy silverado 1500 z71
JA: Are you fixing your Silverado 1500 yourself? What have you tried so far?
Customer: i had the local shop change the throtle body and idler pully i just checked fuel line pressure it was at 60lbs
JA: Anything else you want the mechanic to know before I connect you?
Customer: sounds like a squealing belt when get on the throtle idler pully and surointine belt also changed