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Prev Professional Automotive Repair Technical Discussions for October 20, 2011
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Open Help Requests for GM
Help Request Answers
2005 Buick LeSabre Custom 3.8L Sdm VIN: 1G4HP52K55
The car runs fine but will not crank over with the air bag module connected unless the RIM and the DIM modules are disconnected. The tech 2 also will not communicate with all modules connected. There has been no previous damage.Checked power and grounds and pi...
2008 Buick Lucerne CXL 3.8L fuel pump fuse VIN: 1G4HD57238
found no voltage to fuel pump and tested circuit back all wiring good to relay feed side. The odd thing is that the fuse #1 (20amp) has no power whatsoever even though it shows on the wiring diagram that it should have power at all times. The fuse and the rela...
2000 Chevrolet Corvette 5.7L No Start, Hesitation, Cuts out, Stall VIN: 1G1YY32G0Y
This vehicle came in with a really odd problem. The car always starts but when in gear, if you try to accelerate the car dies. If in neutral, and you pound on the throttle it is fine. You just cannot move the car. I dont even know where to begin on this. I che...
2002 Chevrolet Cavalier 2.2L cooling fans VIN: 1G1JH12F32
Cooling fans?
2004 Chevrolet Tahoe LT 5.3L Unknown VIN: 1GNEK13Z64
i have a 2004 chevy tahoe that came in with a complaint of a noise on acceleration. what i have found is a loud buzzing like noise when the trans is about to shift. this seems to be easier to duplicate when cold.i put it on our alignment rack and when you shif...
2005 Chevrolet Suburban 1500 Z71 5.3L stabilitrac VIN: 3GNFK16ZX5
Please bear with me on this, it's only my second plea for help. Strange problem with the stabilitrac system. The only time this problem presents itself is on normal acceleration from a standing start. at around 7-10 mph both rear sets of ABS valves activate fo...
2005 Chevrolet Uplander LS 3.5L Inst Cluster VIN: 1GNDV03L05
Started out woth a Rf sensor code . Tested wiring and sensor Checked ok. Got a used module installed it and sensor code went away but got stability control codes. Got another used module with same result. Found this vehicle actually has no stabilty control.Got...
2006 Chevrolet Corvette 6.0L No Start VIN: 1G1YY36U16
hi GM guys need some info got this corvette with no start car is stolen recovery we got new key new pcm & new abs module all new from dealer my question is how do i start to get this contro,l units program do i first program pcm then key. thanks for help
2006 Chevrolet Tahoe 5.3L bottom end? VIN: 1GNEK13Z06
We have a medium i guess slightly tin sounding noise in the bottom end of engine,favoring the front part of the oil pan.It is a police vehicle has had proper oil changes.Oil pressure is good by dash guage.I have not yet put a test guage in it.There no codes,no...
2007 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1GCEC14C37
While scanning fuel pump data, vehicle starts out at 58 psi & when fuel pump module decreases pump percentage to bring pressure to desired pressure of 44 psi actual only goes to 54 psi and code sets . Trouble codes: P0191
2007 Chevrolet Silverado 3500 HD WT 6.6L No Start, Cuts out VIN: 1GBJC34647
Hello Duramax guru's: Sorry for the rather long post but this vehicle is driving us around the bend. Intermittently it will crank and not catch; happens every few days, or sometimes more than once per day hot or cold, but so intermittent that it is hard to det...
2008 Chevrolet Impala LT 3.5L MIL Lamp on VIN: 2G1WT58M08
Hello fellow techs. This car came to me for a check engine light concern. I activated the air pump with my snap on verus and the pump did not run. Found no output from the air pump relay. Replaced the relay and then was able to activate the pump with the scann... Trouble codes: P2440 (Air solenoid remains open)

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet S10 LS 4.3L High idle when cold VIN: 1GCDT19W8R
Ok guys, I found the problem today. There was a cluster of hidden vacuum lines under the hood on the driver's side against the firewall under a black plastic cover that contained a total of four connected vacuum lines, 1/8", 5/32", and 7/32" size vacuum lines....
2003 Chevrolet Silverado 2500 HD 6.6L dome lights VIN: 1GCHK23103
when i compaired voltage on the door sw that went to both rt and lf rear doors the left door had 1.1 volts the rt rear door had 11.88 volts i unpluged the connector off of the bcm and did a oms check on the door sw to both rear doors and they both checked the ...
2004 Chevrolet Silverado 2500 HD 6.6L No Start, white smoke VIN: 1GTHK23124
Hi All lots of help on this one and thanks to all ..I couldn't sell the job (diag only) but i am ready for the next one update to my post is ... installed a new filter , inspected fuel (clean as a whistle) no leaks on suction side (9 psi check ) for the next... Trouble codes: P1093.
2007 Chevrolet Cobalt LS 2.2L Starting VIN: 1G1AK55F77
Hello there I found out the problem. I scanned it and got lots of lack of communiction codes. Tested all of the fuses and was not getting any power at the ecm, inj, and air sol fuses. checked my connections again and all were good. Found a 50 amp fuse in the t...
2007 GMC Envoy SLE 4.2L MIL Lamp on VIN: 1GKDT13S87
Thans to all that replied. I put in a new thermostat an cleaned the thorottle body and that took the lite off. I also took it to the GM dealer and had the update flash done. They didn't say what the update was for but it was "NEEDED". You would think there wou... Trouble codes: P1400 (cold start emmision reduction system).
2000 Oldsmobile Alero GL 2.4L abs codes VIN: 1G3NK52T9Y
Hello thanks for the help from all we think that we got it figured out ended up being corosion at the plug
2002 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NF52E72
Sorry guys we didn't realize this vehicle had 2 crank sensors,one to start and one to run,we monitored the start one and had no injector pulse,as soon as we sprayed fuel it started and the run sensor took over.We replaced the crank sensor for starting and all ...
2003 Pontiac Vibe 1.8L air bag lite VIN: 5Y2SL62863
it was the plug end that has the shorting bar i replaced the end an the lite went off thanks for everyones imput
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