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Prev Professional Automotive Repair Technical Discussions for May 23, 2013
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Custom 3.8L blower
a/c drain clogged.water killed blower.i am trying to remove the info in alldata.blower and housing look like it comes out bottom.i have been unable to get all the screws out.i was looking at pics from a parts customer feedback said you coul...
2006 Buick Rendezvous CXL 3.5L vents VIN: 3G5DA03L76
We just posted this vehicle with 2 problems . We received a few responses to one of the problems. The other problem is that if you have the system on dash registers with Ac on the air blows strong. If you leave the vents where they are and just turn the temp. ...
1997 Cadillac Catera 3.0L Misfire VIN: W06VR54R9V
Thanks for reading. Car came in with coolant leak. Battery was dead so I never started the car. Pressure tested the cooling system. Had head gasket leak to outside. Customer had driven in car so I assumed it ran ok. After head gaskets were replaced started car... Trouble codes: P0303
1997 Cadillac DeVille Concours 4.6L MIL Lamp on VIN: 1G6KF5292V
This car was towed to us from another shop, no start, flashing prndl gear indicators, theft system problem may not re-start message, battery goes dead overnight, trac/abs lights on, radio and hvac do not turn on, connected Tech 2, no communication to any modul...
2005 Cadillac SRX 4.6L Cooling Systems VIN: 1GYEE63A85
I have a caddilac here that overheats and has little heat from dash vents. This is from another shop. They were told the vehicle needed a heater core but they found hoses bypassed so they replaced hoses without doing heater core. I noticed while i was checking...
2007 Cadillac SRX 3.6L security VIN: 1GYEE63767
Greetings, This Caddy has what I believe to be a problem in the security system? I could use some thoughts on this, I will try to explain as best as I can because I am going on what the customer has told me. The problem started off this way.. He could unlock t...
1997 Chevrolet Lumina 3.1L Ignition Switch VIN: 2G1WL52M5V
While trying to start the switch doesn't want to turn. Sometimes I can lift up on the column shifter and it will turn. It doesn't do this all the time just sometimes. Any help will be appreciated.
2003 Chevrolet Monte Carlo LS 3.4L Poor Idle Quality, Hesitation VIN: 2G1WW12E43
This vehicle came in with a hesitation complaint. We noticed a collapsed vacuum line on the evap solenoid and that the ect was unplugged which account for the ect code. This vehicle will run great then all of a sudden the fuel trims go to -20 and it starts sur... Trouble codes: P0118, P0420, P1635
2005 Chevrolet Malibu LS 3.5L Brake Lights VIN: 1G1ZT54835
After sitting for a few hours or overnight, when you first start vehicle with foot off the brake pedal the brake lights will come on, and stay on with foot off of brake pedal. When you put youre foot lightly on pedal then brake lights go out and when you push ...
2006 Chevrolet HHR LT 2.2L Steering VIN: 3GNDA23D96
Ok this car came in with the powersteering check coming on in the display. On my test drive i found i had no speedo ,no trans shift and no powersteering. After spending some time i found the owner had taken it somewhere else and they had tried to replace the 6...
2006 Chevrolet Colorado LT 2.8L Timing Chain Tensioner VIN: 1GCCS14816
The timing chain rattles upon cold start for a few seconds. It did not start immediately after head work at dealer. I have removed the oil pan and timing cover. The guides look good. I am wondering if just replacing the tensioner will stop the noise or if I sh...
2006 Chevrolet Trailblazer LT 4.2L rear ac blower VIN: 1GNES16S76
This trailblazer with manual a/c came in with the rear ac blower not working. Customer stated it would come on at random times. We checked and had power to the blower motor but no ground. It grounds through the module. Checked the main ground to the rear unit ...
1996 GMC Sonoma SLE 4.3L Sensor VIN: 1GTCT19X4T
If You Step On The Brake At Around 45 mph, The ABS Would Activate. No Codes. Watching A Graph Of All 3 Sensors, RF Was Spiking Up & Down. Changed Backing Plate (Sensor Mounted To It) And Hub Assembly Because Old Sensor Had Been Rubbing On Tone Ring. Used Dorma...
1997 GMC Sonoma SLE 2.2L No Start VIN: 1GTCS1942V
Vehicle came in with no start. Repaired wires that were tampered with during installation of propane system back to stock. Checked all power and grounds at pcm ok. No ignition pulse or injector pulse. can communicate with pcm, no codes retrieved.
1942 Pontiac Streamliner 4.1L Fuel Pump VIN: THERE1SN21
I feel pretty dumb having to ask this but we have this 1937 Pontiac (shop car) I'm trying to put a fuel pump in it cut and dry pull the lines remove the bolts pull it out. No help from the manual but I have tried every position I can and I can't get the arm ou...
1991 Pontiac 6000 LE 3.1L No Start VIN: 1G2AF84T9M
Grettings: Vehicle towed in w/ no start. Verified concern. No codes (code 12 is because it is not starting). No spark. No pulse. Usually this is either an ignition module or an ecu however when I used my test light to check pulse to injector I noticed that I h...
1995 Pontiac Grand Am SE 3.1L Poor Idle Quality, Stall, lack of power VIN: 1G2NE53M8S
Well after pealing this thing down to do the intake gaskets, to which it ran great coming in, other than the leak. Did the gaskets and vehicle was immediately hard to start. Finally starting, but idle is very poor, currently suspecting EGR. has the Digital 3...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Century Custom 3.1L brakes, abs VIN: 2G4WS52JX3
Thanks for the timely responses,This car has drum rear brakes and as strange as it sounds when we replaced the one wheel cylinder which was barely leaking it was healed.We did also replace the drums.As per received advice we also cleaned the backing plate extr...
2006 Buick Rendezvous CXL 3.5L Dual Zone Controls VIN: 3G5DA03L76
I'm going to close this request even though we didn't find the problem. The main issue right now is the problem seems intermittent and not happening now. I want to thank all that offered assistance for their time and effort.
2007 Cadillac CTS 2.8L No Start VIN: 1G6DM57T17
well guys, i tried alot of things on this car and the only thing i can come up with is that it had something to do with all the rain we have had here lately, i apologize for not having any helpful info about this. i rechecked all the injectors for a leak, insp...
2001 Chevrolet Express 1500 5.0L Misfire VIN: 1GCFG15M01
customer finley brought it back in replaced distributor cap&rotor with ac delco, found the bolts holding the cap down one had come loose so cap was a little loose also the rotor was a little loose, the distributor cap mounting screws one was striped was that w... Trouble codes: P1381, P0300.
2003 Chevrolet Malibu 3.1L Misfire VIN: 1G1ND52J83
The other shop decided to take the car back and put another engine in it. if I hear anything ill update. thanks for all the help and suggestions. Trouble codes: P0300.
2004 Chevrolet Trailblazer LS 4.2L t-case VIN: 1GNDT13S84
i ended up not finding anything for sure on this one. i replaced entire body connector at encoder motor and replaced all terminals to 4x4 module to try something. also ran other wires that were previously not ran new from encoder to 4x4 module. they have had f...
2007 Chevrolet Silverado 1500 Classic LT 5.3L Surge, Stall, MIL Lamp on VIN: 1GCEK19Z57
I got a notice from IATN to close this, or get a bad rating. I talked to the truck owner last week and he said it still hasn't acted up. He will let me know if it does, and agreed to let me try a fuel pressure regulator, as many of you suggested. Thank you.... Trouble codes: P0101 (MAF out of range), P0106 (MAP or BARO out of range), P0128 (coolant thermostat).
2004 GMC Sierra 1500 SLE 4.8L rAEDINESS mONITORS VIN: 2GTEC19V24
Thanks to everyone for responding. Each one pretty much verified that I was on the right track. I replaced the PCM and reprogrammed it, took on a drive cycle and had no problem getting the monitors to ready status. Vehicle can now be turned off and back on wi...
2002 Pontiac Firebird 3.8L Hesitation, Cuts out, Stall, Misfire VIN: 2G2FS22K92
After testing all the coils saw that the spark lines would go way out of whack. Removed all coils and were shooting the spark out to the icm and causing my whacky problems. Replaced 2 coils and icm, ran like a champ thanks for all suggestions.
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