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Prev Professional Automotive Repair Technical Discussions for March 8, 2013
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet Astro 4.3L No Start VIN: 1GBEL19W6R
This 1994 astro is hard starting. It does not happen all of the time, but quite often. It doesn't seem to matter if engine is cold or hot. There is always good spark and 60psi fuel. I think it is something electrical because i do not have any scanner communica...
2003 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK13T13
Truck came in with no reverse engagement in transmission, repaired transmission, attempted flash of VCM to update calibrations for fuel system and transmission control system. The rig I was using was a tried and true setup that I have used many times for GM ve... Trouble codes: U1000
2007 Chevrolet Suburban 1500 LTZ 5.3L Poor Idle Quality, High Idle VIN: 1GNFK16397
I'm stuck on this one. I replaced the Brake switch due to it showing Applied all the time. I also cleaned the Throttle body. After 2 or 3 starts I got a high Idle.2800rpm I tried to relearn the Idle with Snap-on Modis. It would be ok for 2 or 3 key cycles. I... Trouble codes: P0121 (Throttle switch ckt. performance), P0573 (Cruise brake switch a ckt high)
2009 Chevrolet Equinox LS 3.4L MIL Lamp on VIN: 2CNDL13F49
car has all the codes mentioned. plugs wires were changed. customer says then check engine light comes on, the traction control light also comes on and looses power. i am thinking bad throttle body. did the testing as per all data. just wanted to see what othe... Trouble codes: P0121, P0171, P0300, P2119, P2135
2002 GMC Envoy SLE 4.2L Excessive Emissions, MIL Lamp on VIN: 1GKDT13S22
Need some help on this job.has p0440-large leak evap.tested the vent solenoid and failed/cleared code and delivered to customer.returned a few days later with same code-p0440. Does not have service bay test for evap system in tech 2. Did have a purge and seal.... Trouble codes: P0440 (Evap failure-large leak)
2003 Hummer H2 6.0L steering VIN: 5GRGN23U73
Hello,have this 03 hummer H2 the with hydro boost steering system.when wheel is turned to eighter side,with just push of a finger will turn all the way by it self,need some guidance to what or how to ck or what are possible causes.thanks
2003 Pontiac Sunfire SE 2.2L Poor Idle Quality, Surge, Cuts out, Stall, Misfire VIN: 1G2JB12F13
thanks for any help i may recieve.tuned up motor 2 weeks ago.now engine runs rough surges check engine light on code po300.i belive the light was on before customer requested tune up.installed double platinum autolites plugs.engine makes a sound hard to explai... Trouble codes: P0300

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet Tahoe LS 5.7L lack of power VIN: 1GNEK13R0T
o/k here goes, still with fuel pressure gauge no problems found fuel pressure never dropped sensors readings still dont make sense, found bad wires on fuel pump corroded replaced pigtail.runs perfect,but fuel pressure is now 52 idle and 57 under load all senso...
1999 Chevrolet Tracker 1.6L Cuts out, Stall, Misfire VIN: 2CNBJ1865X
Well this morning it reared its ugly head and set a cam sensor P0340 code. So I will check the housing and replace the sensor and try again. Thanks to all who relied.
2001 Chevrolet Silverado 3500 LS 8.1L Hesitation VIN: 3GBKC34G41
Thanks Tray and Dwayne! After sleeping on it I jumped fuel pump balance relay and the transfer pump was bad and drawing too many amps. This was a C3500HD and apparently vin# doesn't pull it up that way Matthew. I apologize and thanks to all for the help. John ...
2000 Oldsmobile Bravada 4.3L no start no spark VIN: 1GHDT13W6Y
thanks to all who replied and especially to timothy [...] for making this easy to understand. had my brain fried on this one for a while but the fix ended up being an intermittant in the ignition module. new module,covered up w...
1996 Pontiac Bonneville SE 3.8L alternator VIN: 1G2HX52K9T
well sorry to say it but customer does not want to go any further on this vehicle it has been a headache, he is probaby trading it off.
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