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Prev Professional Automotive Repair Technical Discussions for December 9, 2009
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Open Help Requests for GM
Help Request Answers
2002 Buick Park Avenue 3.8L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1G4CW54K22
I worked on this car about 3 weeks ago ran fine tuneup cleaned tb and maf. customer came in yesterday said his car stalled sitting still in traffic. had car running looking under hood engine stumbled then recovered. scaned pcm had maf code in history I know wh... Trouble codes: P0102
2005 Buick LaCrosse CX 3.8L MIL Lamp on VIN: 2G4WC53275
Has Mil open, clear and always returns. Replace Valve and checked pipe to exhaust. No change. Pump works. Valve opens when commanded with scan tool. Trouble codes: P2440 (Sec. A.I.R. Valve Stuck Open)
2000 Cadillac DeVille 4.6L tcc VIN: 1G6KD54YOY
po741 stored for tcc lockup. ff data shows code set at 60 mph. after clearing code i road tested with scan tool monitoring tcc. tcc activity was normal showing duty cycle and normal deactivation with brake application. also the 100-200 rpm increase when tap br...
2003 Cadillac Escalade 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GYEK63N43
I have this 03 Escalade, one of our recon vehicles, with misfires at idle. There are no misfires until the idle drops to 575-625 hot idle, park or in gear, then #5 misfire counter runs up steadily followed by #4 at a slower misfire rate. Any slight raise in rp... Trouble codes: P0300 (Random Misfire), P0304 (Misfire Cyl. 4), P0305 (Misfire Cyl. 5)
1992 Chevrolet P30 7.4L No Start, Stall VIN: 1GBKP37N4N
Customer's Motorhome has stalled/engine died twice while driveing at cruise speeds no loads, (other than its a motorhome) 55-60mph. What is happening is that the ECM/IGN 10 amp fuse is blowing. vehicle gets towed in. fuse replaced and the engine starts and run...
2001 Chevrolet Suburban 1500 5.3L Oil Pressure VIN: 3GNFK16T91
Need some help here guys. I replaced the oil pan gasket on this truck and every thing went smoothly. When I started it up it had no oil pressure. When I Reved it the oil pressure jumped right up to 40 - 45 but when it returned to idle it fell to nothing again....
2001 Chevrolet Venture LT 3.4L Cooling Systems VIN: 1GNDX03EX1
After confirmed head gasket we replaced heads and put back together . My concern is the gauge goes to 3/4 and the low fan goes on at 226F. I can command the low fan and high fan from Genisys. When I command either one the temp plummets nicely. I bled the syste...
2005 Chevrolet Impala LS 3.8L radio VIN: 2G1WH52K25
does anyone have the manual procedure to unlock the rds radio as i do not have a tech 2
2005 Chevrolet Tahoe LT 5.3L Tire Pressure monitor VIN: 1GNEK13T75
Hello, we have a 2005 Chevy Tahoe that has a service tire monitor message. It also has a C0775 code ( tire pressure sensor not learned). Here is the story. Customer states that the message came on . No tire rotation or tire removal. He went to two other shops...
2006 Chevrolet Silverado 1500 LS 4.8L cylinder heads VIN: 2GCEC13V86
Thanks in advanced. Truck comes in with a bad lifter noise. Read alldata tsbs and found out about the castec heads. Pulled the valve covers off, bank 2 valve cover had no oil on the inside of the valve cover, hence, coolant washing the head. Castec head cracke...
2007 Chevrolet Express 1500 LS 5.3L MIL Lamp on VIN: 1GBFG15TX7
hello every one and thank you in advance for your time and help. i have a express van that came in with two trouble codes stored related to the heater circuit of the bank 2 sensor 1 o2.we do not have any driveability problems ,just a light on. i ran the o2 hea... Trouble codes: P0050, P0059
2008 Chevrolet Colorado LT 3.7L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GBDS14E38
Hi guys got another problem child here! Ok we bought this truck with a blown motor so we got a motor from a local salvage yard. The motor came out of a 2007 year model which said it was supposed to work if you swap out the cam sensor. So we did all that and go... Trouble codes: P0014 (Camshaft position timing over advanced or system performance), P0366 (Camshaft position sensor B circuit rangeperformance), P0300 (Randommultiple cylinder misfire)
1998 GMC Safari SLT 4.3L blower high speed VIN: 1HKEL19W7W
The vehicle keeps burning out the high speed wire to the blower. All the other speeds work and don't have a problems. My friend has replaced the above mentioned parts twice and it only lasted a week this last time. I haven't looked at the van yet but the plan ...
2000 GMC Savana 2500 5.7L Electronic VIN: 1GTFG25M5Y
Transmission GURUS, need some help on this one. 2000 GMC savanna work van with a 4L60E ck engine light keeps coming on seeting P1810. Electrical test were done on TFP switch and harness and found out that GM had an updated TFP switch and harness.Removed Transm...
2004 Saturn L300-1 2.2L MIL Lamp on VIN: 1G8JC54F24
car came in with p0455. checked gas cap and was tight. code stored in history not pending. sealed system with scanner and watched fuel tank pressure drop and hold. thought they left gas cap loose and shipped car. told them if light came back on would have to t... Trouble codes: P0455 (evap gross leak)

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick LeSabre 3.8L Seat Belts VIN: 1G4CW54C7K
Seemed to be two different problems with this vehicle. Problems with the seat belt electrical seemed to coming from the timer in the right door, but as there are no parts available, I cannot know for sure. After examining the belt reels, found that there are p...
1995 Buick Regal 3.8L Stall VIN: 2G4WB5215S
well guys thats all we got in an hour. car came in an hour before we closed, customer needed vehicle. i left it open for a couple weeks, but she never returned. oh well... Trouble codes: P0117, P0321, P1361, P1670.
2005 Buick Terraza CX 3.5L stability system VIN: 5GADV23155
sorry for the long close time on this fix bu we had to be sure. after replacing every component in the yaw rate system including ebcm and reprogramming the problem was still there. we then replace all the wires coming from the yaw rate sensor to the ebcm it ...
2005 Buick LaCrosse CXS 3.6L power steering VIN: 2G1WE56715
We replaced the power steering pump and the presure line, the system had been flushed prior to this, each time the pressure line blew off. The pressure releave valve was not avaible seprately from the pump and we could not find anything eles wrong. Thank you t...
2005 Cadillac CTS 3.6L Brake assyst VIN: 1G6DP56775
Thanks for all the replies they were all helpfull.I was hoping it could have been done with out the Tech 2.Well I just borrowed a Tech 2 and did the job.Light is now out. Well someone asked me why I reprogrammed all these modules.I am chasing a no start prob...
1990 Chevrolet Lumina APV 3.1L rear drum brakes VIN: 1GLBU05D8L
Hi Guys.First I Want to thank everyone that offered help,there were 27 replies and you know who you are so im not naming names.a majority of the replies recommended OEM shoes,and that was the fix,i threw in a set of hardware since i was there.The lumina stops ...
1994 Chevrolet G20 Chevy Van 5.7L Stall VIN: 1GCEG25K1R
Thank you for the (24) replies. The problem was the ECM. When I got a scan tool and cable capable of reading the sensor values on this old (OBD1?) system I determined that the computer was showing a MAP sensor voltage different from what was being output by th...
2000 Chevrolet C3500 7.4L fuel gauge VIN: 1GBKC34J3Y
First of all, I forgot to mention that this vehicle came in with the transfer pump for the rear tank not working. Replaced the pump and solved that problem. I would have returned it to the customer at that point. But the boss wanted to know what was wrong w...
2003 Chevrolet Impala 3.4L Body Control Module VIN: 2G1WF52E83
Thanks to everyone who shared thoughts and experiences with G.M. BCM problems. After talking to customer I found out he recently had an ignition switch installed. Re-checked previous work done elsewhere and found crushed terminal from wiring plug to ignition s...
2006 Chevrolet Trailblazer LS 4.2L mode door acuator VIN: 1GNDT13S95
Sorry for the delay on closing. I want to atleast thank the people that took the time to reply to my request.I was able to look at the car one other time and the part numbers were correct, and the door was lined up properly with the notch on the actuator.Still...
1998 GMC K1500 Sierra SL 5.7L No Start VIN: 1GTEK19R9W
Thanks for all the help. It turned out to be the vent valve wasn't venting the tank and kept vacuum in the tank. I changed the valve and let sit for two days and it started every time. Again thanks for all the help. Mike
2005 GMC Envoy SLT 4.2L 2nd gear, 4th gear VIN: 1GKDT13S65
Thanks for all the help. It's nice to receive positive confirmation of thoughts and ideas that I was already having. I pulled the pan off the bottom and checked the solenoids and they seemed okay. There was a tremendous amount of black friction material in the...
1997 Pontiac Grand Am SE 2.4L lifters, valves VIN: 1G2NE52T1V
Well I must say this was an experience it turns out that when the rebuild shop did the head they put in springs from a different engine but the wont admit it. After checking virtually every thing I managed to find borrow a spring tester. they were right out o...
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