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Prev Professional Automotive Repair Technical Discussions for December 14, 2011
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Open Help Requests for GM
Help Request Answers
1999 Buick Park Avenue Ultra 3.8L Stall, loses power, stall, VIN: 1G4CU5219X
complaint of losing power, intermittent, said while accel from stop couple of times, and lost power while moving few times also, and actually stalled couple of times.. wont act up for me.. current ramp fuel pump but cant decide what the signal is- has steady h... Trouble codes: P0300
2000 Buick LeSabre Custom 3.8L intake gaskets VIN: 1G4HP54K8Y
To all, Thanks in advance. I have a 3800 buick motor that was using coolant. When I picked up the car it was also misfiring. I pulled the upper intake expecting to find the intake burnt where the EGR tube comes thru. However the intake and the gasket look goo...
2006 Buick Rendezvous CXL 3.5L Rear brakes stay applied VIN: 3G5DA03L56
Has anyone run into this condition? I depress the brakes on the hoist and the rear brakes do not release,slightly press back on the caliper and it returns with little or no effort.Thanks for any help in advance.Dave.
2002 Chevrolet Trailblazer LS 4.2L Temp Blend Motor VIN: 1GNDS13S32
Hi all this one came in blowing hot air on left side only. Its manual air. Pulled lower cover to see if motor moves it does not. Commanded it with tech2 still does not move.checked signals to motor all good, smack it and it works so i replaced it and mode moto...
2003 Chevrolet Silverado 1500 WT 4.8L Stall VIN: 1GCEC14V13
i have a 03 chev truck that on first start up of the day it will stumble then stall or if it sits most of the day. did do a intake gasket it was leaking but did not fix problem. did check for leaking injectors let them sit over nightwith pressure on them pull ...
2004 Chevrolet Optra 2.0L No Start VIN: KL1JD52Z94
This car will not start due to weak injector pulse. It has good fuel pressure 65 PSI strong spark , 145 PSI compression. When we first turn the engine over the injector tester will give one or two strong pulses and then the pulse becomes weak and the engine ju...
2008 Chevrolet Uplander LS 3.9L no heat
no heat at idol, system full.flushed heater core,has rear air
1997 GMC C3500 Sierra SL 6.5L MIL Lamp on VIN: 1GTHC33F7V
Hey guys I'm not a big diesel guy and I'm a little lost here, I am trying to help a customer/friend and he just purchased this from a used car lot. I tested for the 5 volt reference at the optical/fuel temperature sensor and that's good, at that point I starte... Trouble codes: 183 (fuel temp. sensor circut high), 231 (fuel/lift feedback circut low), 251 (inj pump a rotor/ cam problem), 370 (timing reference a high res problem), 238 (boost sensor 1 circut open/high)
1999 GMC K2500 Sierra SLE 5.7L Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GTGK29R7X
Here is a good one for everyone. This truck came in with the complaint that the ECM1 fuse blows within 20 miles of driving. Engine falls dead and no restart until fuse is replaced. Engine misfires before fuse blows and engine pings. It originally had a missing... Trouble codes: P0141, P0758, P1351
1999 Oldsmobile Alero GLS 3.4L Stall, start &stall VIN: 1G3NF52E0X
Hello to all, we have this 99 Alero that was towed in with a start & die symptom. First thing we noticed is the tac does not move while cranking or running(2 seconds). the fuel level gauge is barried at empty & the battery light is on all the time even when ru...
2002 Pontiac Bonneville SE 3.8L Surge VIN: 1G2HX54K42
We are in need of some help with this one! We have a 2002 pontiac bonneville se with a 3.8 vin k and it is driving us nuts. When driving under VERY light load around 45 to 55 mph it will have a sudden jerk every once and a while. It may do it a couple of times...
2004 Saturn Ion-2 2.2L recirculate motor VIN: 1G8AJ52F14
How do you replace the recirculate door motor? I have removed all the dash skin and plastic support, but the cross dash metal support won't loosen enough to gain access to motor connector and mounting screws.

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Century Custom 3.1L No crank no start VIN: 2G4WS52J22
Boy do I feel dumb. I am sorry for wasting everyones time. When I found out I did not have voltage from fuse 22 underhood fuse block I should have found out why. I had suspected rodent damage and did not even think about battery corrosion. Mainly because wire ...
1968 Chevrolet Camaro 5.7L Cuts out
I had many helpful replies.Restricted fuel lines, incorrect voltage at the pump, faulty fuel pressure regulator, and wrong fuel pump were all suggested but all checked out ok. Customer picked up vehicle and is going to bring it back later. When he does I will ...
1995 Chevrolet K3500 Cheyenne 6.5L Electronic VIN: 1GCHK33FXS
Ok guys thanks for the replies. What we ended up finding that we first had a communication problem with the Modis that I use and this truck. I got this tip from Identifixs.I was getting all false codes because of this. I borrowed a Tech 2 and was able to get a...
2004 Chevrolet Silverado 1500 5.3L Instrument Cluster VIN: 2GCEC19T84
Thank you to all that replied. I contacted the company that repairs radios and instrument clusters for GM and they said that before it was mandated it would have been an option in the reprograming routine but now that we use TIS to web for calibration files it...
2006 Chevrolet Equinox LT 3.4L Stall, MIL Lamp on VIN: 2CNDL73F76
mark from oregon gets to yell bingo.after more diag. we found the horn would not work and when pushed it would turn the turn lights on. pulled the left headlight and yes g 101 was very loose we remounted with lock washers. side note the daytime running lights... Trouble codes: P0230 (Fuel circuit).
2006 Chevrolet Malibu LT 2.2L Stall, Misfire VIN: 1G1ZT51F56
thanks for all the replies & information from everyone,i replace the ignition module,coil assembly & spark plugs,it still burned out the ignition module but the last time it came back i tighten all the electrical pins at the module connector,it has been around... Trouble codes: P0301, P0304.
2006 Chevrolet Impala LS 3.5L Sdm VIN: 2G1WB58N16
Well this one is fixed. Sent car to the dealer to try and put latest flash into SDM after exhausting all other avenue's.They put latest flash into SDM with no luck. Informed us that it would need a new SDM and re-programming. Once the new SDM was install...
2007 Chevrolet Impala LT 3.5L engine VIN: 2G1WT58N47
The owner took the car to a dealer who thought it was a lifter problem. They added BG MOA oil treatment. The noise for now seems to be gone.
2008 Chevrolet Colorado WT 2.9L MIL Lamp on VIN: 1GCCS14998
Thank you for all that replied to my help request this was the first one of these that I had tackles and I could not rely on past experience or a good flow chart from AllData or Mitchell. In my update I mentioned that I removed the valve cover to reinspect the... Trouble codes: P0017 (Crankshaft position - exhaust camshaft position correlation).
1997 Geo Prizm LSi 1.6L Poor Fuel Economy VIN: 1Y1SK5265V
Thanks to Jared from Kentucky I found a leaking fuel pressure regulator. On the vacumm side of the regulator, gas was being sucked into the intake, but not bad enough to notice out the tailpipe. After replacing the regulator the fuel consumption is very low no...
1999 GMC Yukon Denali SLE 5.7L Intake VIN: 1GKEC13R3X
vehicle is fixed thanks for all your replies. we went to an OEM gasket and replaced the manifold. the manifold looked fine at the leak area but one of the other corners was starting to pit. by replacing it now we decided we were avoiding it leaking in the pitt...
2003 GMC Sierra 2500 HD SLE 6.6L HVAC control VIN: 1GTHK23193
Well I ended up checking all the vent temp sensors and those all ohmed out to 1.7K ohms(I think it was K ohms anyways, I had to put my meter on diode function to get them to read anything). After compairing to a known good sensor I moved onto the blend door a...
2009 GMC Yukon Hybrid 6.0L Brake Assist VIN: 1GKFC13569
I was able to repair this vehicle by performing an EBCM relearn with the factory scan tool (Tech 2). None of the responses gave any information about how to perform this relearn with a generic scan tool. It appears that this code was set inadvertently when the...
2000 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K7Y
thanks for the help. we double checked the fuel pressure-ok. we checked exhaust system back pressure-ok. we plugged off all the vacuum ports-no change. well, the driving trims changed a little due to the vacuum source being removed from the fpr. we checked for... Trouble codes: P0171.
2005 Pontiac Vibe 1.8L starter VIN: 5Y2SL63885
Thanks to Dan,Brian,Paul & Mark neutral safety switch fixed the problem.I suspected the switch from the begining but because of the cost I wanted reassurance that i was on the right track before ordering it!!!
2007 Saturn Outlook XR 3.6L Transmission VIN: 5GZER337X7
Thank you for the quick responses I got. Steve from Quebec was very helpful and took time to email me. To answer my original question the fast learn adapts to not have to be performed for the vehicle to move. My intial thought was the reason it would hardly mo...
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