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Prev Professional Automotive Repair Technical Discussions for July 2, 2010
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Open Help Requests for GM
Help Request Answers
1964 Buick Riviera 6.6L TXV Valve
This Buick was converted by another shop to 134A refrigerant and is currently inop. I am in the process replacing a clogged TXV valve. Four Seasons P/N 38652. It appears that the oil bleed tube is going to be too short to reach the STV valve housing in the eng...
1983 Buick Regal 3.8L Stall
im gonna need a real pro on this one--one that knows the Rochester feedback 2 barrel carb and its tuning. the problem is a flat spot off idle--transition fuel. when starting from a stop, the engine coughs lean and dies. Feels exactly like a bad accelerator pum...
1993 Buick LeSabre Limited 3.8L Surge, MIL Lamp on VIN: 1G4HR53L5P
Hello fellow techs, Please enlighten me on where I am going wrong. This car came in with the complaint of an intermitant CEL on, eratic shifting, and no cruise. I found the vacume modulator hose bad and corrected a large part of the trans issues. I have a cod...
1997 Cadillac Seville SLS 4.6L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G6KS52Y9V
Hello everybody. This vehicle came to us after it was at another shop. They said it had a bad fuel pump & replaced it - and it still didn't run. They found the ECS fuse blown. Installed new fuse and vehicle ran & they shipped it. It came to us because it kee...
2003 Cadillac CTS 3.2L Vses VIN: 1G6DM57N33
Urgent please help!!! this vehicle came to us with many issues. One of which was the service stability system on center console will illuminate while driving. We tested computer and found trouble codes c1286 and c 1287 we some how came to the conclusion that t...
2000 Chevrolet Silverado 1500 LS 5.3L Hdy. system VIN: 1GCEK14T1X
This one has got me snow blind. Maybe some fresh ideas will get this one delivered! Truck came in with rusted/ leaking steel brake line @ ABS motor. Replaced 3 lines from ABS motor to master and to r/ front wheel. Fired up my Solus and went thru automated ble...
2004 Chevrolet Silverado 3500 6.6L Unknown VIN: 1GCJC33264
Hi,Guys, I,ve got this 2004 chevy 3500 that has a shudder on the brake.It does it only from about 5-8 miles per hr to stop and it gets a lot worse when you make either r/l turn while braking at that slow speed.It feels a lot like ABS activation.The truck has n...
1998 GMC Savana 1500 5.0L Poor Idle Quality VIN: 1GDFG15M8W
This vehicle has a boat load of problems. Most of which i have corrected except for this high idle issue. This van came in on the wrecker, wouldnt idle to save its life. it was leaking coolant, power steering fluid, a/c didnt work and was stumbling everywhere... Trouble codes: P1509 (Idle Air Control System High RPM)
2001 GMC Safari SL 4.3L No Start, Stall VIN: 1GTDM19W01
Have a 01 Safari that the customer limped in. Failed to start after a quick delivery, while waiting for the tow truck it started and she drove it here. Hasn't started on it's own since, has no Communication, replaced DLC fuse and got data. Will run on carb cle...
2002 Oldsmobile Bravada 4.2L No Start, Stall VIN: 1GHDT13S72
Vehicle has a history of stalling and not starting. I was able to check several items on a no start condition. The starter will not engage even though the PCM has the enable starter command. All other accessories are working. The bar for the gearshift indicat...
2001 Other GM STEP VAN 6.5L No Start VIN: 5B4KP42Y61
Diesel guys.this truck does not start there is no fuel coming to injectors we replaced the fuel pump under the chassis there is none in the gas tank. We get 9 lbs of pressure before injection pump is this right?. What is the right fuel pressure the system have...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Limited 3.8L Stall VIN: 1G4HP52L3S
I finally got this fix.lots reply said injector short out when hot ,run new wires from icm to ecm,another icm ,disconnet alternator field,chech power and ground,ignition switch,spike from open secondary wire.I check them all and still the same problem.I know t... Trouble codes: P0341.
1997 Buick Riviera 3.8L all electrical VIN: 1G4D2211V4
Thanks all ecspecialy those that called.I cleaned grd from body to batt.. just to feel better added grd from altenator body to strut tower. Not sure which one took care of problem but all is well now. Thanks again John
1999 Buick LeSabre Custom 3.8L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1G4HP52K4X
ok so after testing every sensor all checked out ok the injectors are pulsing normally (checked with noid and pressure drop) replaced the ecm. My LTFT are sitting at -2 and STFT at 0. Car seems to be running just fine now no smell out of the tail pipe or smo... Trouble codes: P0172 (Fuel System too Rich Bank 1), P0101 (MAF Performance/Range).
1992 Cadillac DeVille 4.9L Compressor Clutch VIN: 1G6CD53BXN
Thank you all for all your replies and ideas. The customer has decided to trade for a newer vehicle. I'm convinced it was a condenser problem, but now we'll never know. Thanks again for all the replies.
1993 Cadillac DeVille 4.9L Security Indicator light VIN: 1G6CD53B6P
found out that the light blue wire that runs to the door latch switches has a major splice than runs through out the car all four doors and the trunk latches and also between the security module and pcm there was a grounded wire within all of that and the en...
1993 Chevrolet S10 EL 2.8L turnsignal VIN: 1GCCS19R8P
Thanks everyone . I was given great advise from everyone and finished the repair with no problems. This design forces you to remove the column covers and then seperate them and then removed nut from combo switch. I believe the tilt wheel design is different an...
1999 Chevrolet S10 4.3L Oil Pan VIN: 1GCCSI4X1X
parts store decided to put in rebuilt long block,not willing to gamble on just replacing oil pump.I think that Was a smart move!!Had no faith that a pump would help
2001 Chevrolet Impala 3.4L No Start VIN: 2G1WF55E51
Well i have this impala fixed.The repair was to drill out the lock clylender and replace it with a new one.From the replies i received i suspect this is a fairly common problem on this vehicle.Drilling out the cylinder was a task. If anybody has any tips to sp... Trouble codes: B2964 (Key in ignition circuit high).
2003 Chevrolet Silverado 1500 HD LS 6.0L 4-3 down shift VIN: 1GCHK29U23
we replaced the trans test drive same thing replaced tranfer case works good now
2006 Chevrolet Silverado 1500 LT 5.3L Transmission Computer Data Lines VIN: 1GCEC19Z76
Many many thanks to Brian for consistent replies and answering all my questions. I got the data lines all hooked up, and the check engine light illuminates on the dash and the DLC gets what it needs. still no communication, but I'm off to tackle that glitch ri...
2007 Chevrolet Silverado 2500 HD LTZ 6.6L oil sample VIN: 1GCHK23667
Thanks for all the replies. I change the oil every 5000 miles with rotela t. I will take the truck to the dealer and have the injectors checked. Thanks again for the info on my diesel fuel injector system.
2002 Saturn L300 3.0L ECM Grounds VIN: 1G8JW54R72
Thanks to Rob [...] and Mitchell who took the time to respond to this cry for help After checking the grounds and connectors at the splice pack which is about midway across the rear valve cover and the left instrument panel fuse block and finding no is... Trouble codes: P1283 (APP Sensor 2 Circuit High Voltage), P0453 (EVAP Fuel Tank Pressure Sensor Circuit High Voltage), P0463 (Fuel Level Ssensor Circiut High Voltage), P0533 (A/c Refrigerant Sensor Circiut High Voltage).
2007 Saturn Vue 2.2L 1st gear only VIN: 5GZCZ33D26
Thanks for the help, it is behind the dash, just behind and left of the steering assist motor. I unplugged the transmission connector, powers good and grounds also, still no communication, The customer is checking to see if it is covered under the warranty.
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