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Prev Professional Automotive Repair Technical Discussions for November 30, 2011
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Eldorado ESC 4.6L inner cv boot VIN: 1G6EL12Y8Y
Got a OEM boot kit for both the inner and outer boots. The inner is a two piece boot with one piece going around the tulip part of the cv joint and the hard plastic part goes around the first piece and the small end goes around the axle shaft. the large clamp ...
2000 Chevrolet Suburban 1500 LT 5.3L Pcm VIN: 3GNFK16T2Y
Towed into are shop. No voltage at fuel pump no voltage coming from fuel pump relay. Diagnose no voltage coming from pcm ( dk green w/ white ) energizing relay.removed pcm and found melted chip inside. Note : found out original pcm burned up same way.load test...
2000 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH55K8Y
Vehicle came in with code, tested and found oxygen sensor wired incorrect. Install correct oxygen senor to no avail same code immediately. Tested circuit again and came to same conclusion, replace oxygen sensor. Replaced again with AC-Delco (as did originally)... Trouble codes: P0134 (B1s1 02 sensor ckt inactive)
2001 Chevrolet Silverado 1500 4.8L 3rd gear VIN: 1GCEC19V31
I will be visually looking at the war pattern in the differential since it is already open, but the wear on the u-joints is something which I shall recommend the customer to fix but I want to know exactly why it occurs at about 3rd gear and no codes are presen...
2003 Chevrolet Tahoe LT 5.3L alternator VIN: 1GNEK13Z43
Hello thanks in advance, customer states he replaced battery and ever since it does not want to idle when warm- no codes, can visually see all lights flickering and voltage guage on dash bounces between 11-14ish at idle, runs great right after startup untill i...
2004 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 1GNEK13Z64
Function tested EVAP vent solenoid using scanner and verified it's ability to open/close (seal & release) I also tested the purge solenoid and it's ability to pull a vacuum on the tank, also the pressure sensor changing with vaccum in tank. Reading other posts... Trouble codes: P0446 (EVAP Vent performance)
2006 Chevrolet Trailblazer LT 4.2L wot hesitation VIN: 1GNDT13S76
acts like plugged exhaust. cruising trans feels like it skips from 1st to 4th shifts at 3500 -4000 rpm. but the customer concern is at wot the trans down shifts to 2nd and accelerates till it hits the rev limiter and will not shift till u let off the throttle.... Trouble codes: P0171, P0300, P0506, P1400
1997 Geo Prizm LSi 1.6L Poor Fuel Economy VIN: 1Y1SK5265V
I recently bought this car used, been noticing poor fuel economy. Checked the basics, plugs, wires, cap, rotor, air filter, timing, all good, timing is right on the money. So I ran a scan and found bank 1 sensor 2 o2 sensor not responding well. I replaced both...
2003 GMC Sierra 2500 HD SLE 6.6L HVAC control VIN: 1GTHK23193
This is my personal truck and I've finally gotten annoyed enough to fix it. What I have going on is my HVAC unit will not control the temp on manual mode(It also does not maintain a temp when set to AUTO mode either). When I set it to 60*F it blows cold but o...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Camaro 3.4L No Start, Poor Idle Quality, Stall, Misfire VIN: 2G1FP22S4R
Problem found was intermittent Ignition module. Module drawing high current causing low/no cam sensor output. ECM loosing track of #1 cylinder causing loss of fuel control. After 20 minutes engine would stall and not restart also poor off idle performance. Rep...
1996 Chevrolet Blazer 4.3L Steering shaft coupling VIN: 1GNCS13W2T
The replies for my problem varied from several used part websites to some OE leads as well. I am going to go with the OE intermediate shaft to repair this problem. There is too much risk to go with a used shaft.
2002 Chevrolet Monte Carlo SS 3.8L Poor Idle Quality, Surge, Cuts out, Stall VIN: 2G1WX15K32
hi guys,thanks for all of your time and for all of your help.this is the gratest orginization ever.i wish that i could tell you guys what fixed this car and i wish i had been able to follow thru with some of the great ideas that i got hear,but the car got hit ...
2005 Chevrolet Silverado 1500 5.3L Mechanical VIN: 1GCEK14T85
2007 Chevrolet Suburban 1500 Z71 5.3L Radiator VIN: 1GNFK16347
Customer wanted to just replace the water pump and the intake gaskets. We flushed out the cooling system and performed oil change. Customer will come back to monitor engine oil level. Thanks for all replies.
2007 Chevrolet Cobalt LS 2.2L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1G1AK15FX7
thanks for the help but i couldnt fix this car now customer needed car back said they would bring it back next week Trouble codes: P0102, P0121.
2008 Chevrolet Impala LS 3.5L Rough on cold start VIN: 2G1WB58N68
When the problem occured cold, I watched select PIDS each time I cranked it cold. When watching Injector Pulse Width, I saw no injector pulse even though the engine ran but very rough and lean. After a few moments of sputter, IPW came up on the scanner and it ...
2000 GMC K3500 Sierra SLT 5.7L erratic downshifting VIN: 1GTHK34R6Y
ok this teuck just acted like a bad speed sensor, and after all the messing around we finally removed the speed sensor and there the metal bracket bolts ,it had some build up of corrosion under it causing the sensor just sit a little to far from the reluctor. ...
2003 GMC Sierra 1500 SLE 4.3L air bag sys VIN: 2GTEC19X73
well the module under the seat seems to be bad and the transducer for the seat detection also is not sending a return signal ,, parts are over $600.00 from dealer as i usually dont fix srs systems with used parts ,, customer decided to s...
2004 Pontiac Grand Prix GT1 3.8L No Start VIN: 2G2WP54214
I checked the voltage comming from the ignition swith and it was always there. I could not get this car to act up again, we let it go, its been 3 weeks, customer has not been back.
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