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Prev Professional Automotive Repair Technical Discussions for January 22, 2015
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Open Help Requests for GM
Help Request Answers
1995 Chevrolet Camaro Z28 5.7L egr system VIN: 2G1FP22P9S
Vehicle failed emission test with high Nox but CO and HC are good. checked EGR system first and found EGR valve does not get right vacuum signal from the solenoid, after further check found ECM ground momentarily the EGR solenoid (just for one second) and shut...
2000 Chevrolet S10 4.3L misfire VIN: 1GCDT14W1Y
truck came in to shop with p0300 random misfire.pulled plug wires one at a time and left cyl 5 and right cyl 6 rear both dead.had spark at cap to wire.runs on four cyl.plugs were not wet with gas so i put in spider injection and still have misfire.any help ple...
2007 Chevrolet Malibu LS 2.2L fuel guage VIN: 1G1ZS57F87
this vehicle was brought in by used car lot.when ign turned on speedometer needle quivers for about 4 seconds stops quivering and gas gauge goes to 3/4.turn key off to exit vehicle speedo needle quivers for a few seconds and stops quivering.they put a fuel sen...
2007 GMC Sierra 1500 WT 5.3L Excessive Emissions, MIL Lamp on VIN: 2GTEK13M57
MAF replaced with harness smoked intake-found no leaks come off idle fuel trims are great- idle engine long term go high short term are perfect. gotta have a vacuum leak somewhere!!! pulled upper intake manifold -found gaskets were deformed. problem still ther... Trouble codes: P0171 (p0172-), P0172 (p0449-), P0449
1984 Pontiac Fiero 2.5L Fuel Tank VIN: 1G2AM37R5E
Hello all, We have a customer with a 1984 pontiac fiero. The fuel tank is leaking and in need of replacement. But we cannot find a new tank for this thing. Just wondering if anyone had a line on a fuel tank. New or used doesn't matter! The issue with used is ...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet C3500 Cheyenne 7.4L No Start VIN: 1GCHC33J6T
Thank you for the informative responses, once again all the techs. on IATN helped a lot!! After reading the responses we opted to replace the distributor (after checking the cam gears teeth) and the truck runs like a champ!! Turns out this was the first tune-u... Trouble codes: P0340 (Cam position sensor).
2004 Chevrolet Impala LS 3.8L Heater Inop VIN: 2G1WH52K04
well thanks for all the input it turned out to be the blower motor and resistor
2006 Chevrolet Malibu LT 3.5L Cuts out, Stall VIN: 1G1ZT51856
thank you all for the help some times we just have to go back to basics come to find out the throttle body just needed to be relearned also re-flashed pcm with updated software thanks a ton everyone
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