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Prev Professional Automotive Repair Technical Discussions for October 9, 2012
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Open Help Requests for GM
Help Request Answers
1997 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R5V
Vehicle came back yesterday with multiple cyl. misfire code and had a feeling the (reman)injector unit went bad and used a bore scope to confirm the fuel pressure regulator was leaking bad.Replaced with a Delco unit and all was well except a cyl. 3 misfire on ... Trouble codes: P0300 (Multiple misfire)
2000 Chevrolet Suburban 1500 LT 5.3L rattle noise on rail VIN: 3GNFK16T5Y
Good afternoon group, this Suburban has a buzzing or rattle type noise coming from the fuel rail at the fuel pressure regulator on the return line only at idle. I remove the vacuum supply line to the fuel press. reg. and the noise goes away and while driving, ...
2001 Chevrolet Suburban 1500 5.3L front vent outlet air temp VIN: 3GNFK16T71
i need to know what these temp sensors should be reading and how close the temp should be to the auto dial from the output temps
2007 Chevrolet Equinox LS 3.4L Starting VIN: 2CNDL13F57
I have an Equinox that was towed in and wouldn't shift out of park or allow you to turn the key to the off position. Also, when key is turned to crank, vehicle won't crank. No security light and no security codes stored. I have not been able to communicate wit...
2005 GMC Yukon XL 1500 SLT 5.3L Radio VIN: 1GKFK16Z25
This truck came in about 8 months ago with an intermittent whistle noise coming from the radio. The noise was not present the day it was here. Checked the charging system,battery and connections. The alternator started to fail about 3 months ago and was replac...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Chevrolet Camaro Z28 SS 5.7L Excessive Emissions VIN: 2G1FP22G6Y
Customer left after spending an entire day of us trying to diagnose this problem.We never figured out why the computer wouldn't turn on the EGR.He mentioned during the course of the day about getting a "special" smog,I imagine that's what he did. Trouble codes: P0410 (Air injection pending), P0405 (Egr sensor low volt history), P0410 (Air injection pending), P1416 (Air injection bank 2 history).
2003 Chevrolet Trailblazer LTZ 4.2L MIL Lamp on VIN: 1GNDS13S73
After testing all wiring I came to the conclusion the throttle body is was the problem. Could never get the problem to duplicate and informed customer of that. I recommened TB & customer agreed. Have test drove and checked. No Problems Trouble codes: P271.
2003 Chevrolet Impala LS 3.8L Stall VIN: 2G1WH52K83
daughter has now gone home with vehicle. Has not acted up lately after several drives so hopefully it is fixed. I suspect it needed to relearn the idle position after the throttle body was removed and cleaned. 1 reply suggested doing an idle relearn. Most s...
2006 Chevrolet Cobalt LS 2.2L idles too fast VIN: 1G1AK55F36
Thanks again for the replies. After driving the car nearly 100 miles I gave up and took it in to GM for PCM reprogram. All is now well, in fact I think it runs a little better than it used to. Interesting side note: I found only one fix in iatn database which ...
2000 GMC Sierra 1500 SL 5.3L high steering effort VIN: 2GTEK19T5Y
first of all thanks for your time and help. we disconnected the gear box and tie rods to test front suspension and steering colum joints for binding. ball joints had some rough spots during rotation.. so we replaced upper and lower ball joints. the steering ge...
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