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Prev Professional Automotive Repair Technical Discussions for September 11, 2006
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L Speedometer VIN: 1G4CW52K7W
Good Evening Ladies and Gentlemen, Thanks in advance for reading this. This vehicle is at one of my customer shops with the speedometer not working. The shop has replaced the instrument cluster, PCM and the wire from the PCM to the instrument cluster that car...
2001 Buick Park Avenue 3.8L power door locks,windows,mirrors VIN: 1G4CW54K61
hello fellow techs.we are lost and could use some direction.this 02 buick came in with customer complaint of no power door locks,windows or side mirrors.we also noted that the radio doesn't shutoff when door opened, key in ignition chime inop, headlamps on chi...
1996 Cadillac Eldorado ETC 4.6L battery VIN: 1G6ET1295T
Hi all, All you cadillac pros help!!! The customer brought us this 1996 eldorado with a complaint of batt goes dead over a few day period of sitting. We checked for a parasitic drain the drain fluctuates between 1400ma-2700ma. After playing the remove 40 milli...
1992 Chevrolet Astro 4.3L abs system VIN: 1GNE19WGNB
Okay fellow Techs, we replaced the ehcu with used unit due to codes # 62 & 63 but only after inspecting and cleaning grounds for unit clearing codes and retesting for codes all diagnostics for codes # 62 & 63 with good powers and grounds to unit call for repla...
1993 Chevrolet C1500 Cheyenne 4.3L transmission VIN: 1GCEC14Z1P
Hey everyone, I've been scratching my head about this one for a while. This one came in on a hook with a hole in the block. I replaced the 4.3L and went to test drive. It shifts good at a medium or heavy throttle, but at a light throttle it will shift gears wa...
1996 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W3T
we replaced motor with a gm reman for knocking noise. customer then comes back four months later with check engine light. (po442) we just bought a smoke machine so we put it to use for maybe the 5th or six time. we decided it was the vent solenoid that was the... Trouble codes: P0442
1997 Chevrolet K1500 Suburban LS 5.7L No Start VIN: 1GNFK16R4V
truck was at another shop before we got it.the spider was changed,the crank sensor was changed and the starter was changed.cust complaint is when starting first thing it acts like timing is advanced and bucks when starting.We checked for codes and fuel pressur...
2004 Chevrolet Tahoe LS 4.8L Hesitation, Surge VIN: 1GNEK13V74
This vehicle is owned by the US Border Patrol. The agent which drives the vehicle states that when the vehicle is in the field at times extensive idling is required. After several hours of idling he experiences that the vehicle runs poorly, surges. It will run...
2004 Chevrolet Silverado 2500 6.0L engine VIN: 1GCHC29U04
hell-o i need some help on this one. truck came in with a oil pressure problem. driver say oil gauge goes to 0 and hears upper engine noise. the first time in we check engine oil pressure at oil filter. which is gm's way of checking oil pressure. truck had goo...
1998 GMC Jimmy Envoy 4.3L Compressor VIN: 1GKDT13W9W
The problem is that the customer drives for 10 to 15 minutes before the a/c will start to work. Every function of the computerized automatic system works except that the a/c clutch will not engage until the vehicle has been run for at least 10 minutes. In auto...
1999 GMC C1500 Suburban SLE 5.7L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1GKEC16RXX
ck. all wiring, good, replaced ckp sensor, no change, replaced vcm with gm reman. and reprogrammed, no change. vehicle takes spells and cuts out, back fires, chugs, etc. have been unable to locate source of problem. any suggestions welcomed. Trouble codes: P0339
2000 GMC Jimmy SLE 4.3L Shifter stuck in park intermittently VIN: 1GKCS13W6Y
Hello everyone thanks for any help in advance. I am needing help determining exactly where the power feed for the pink wire that goes into the shift interlock solenoid (Floor shift) the wiring diagrams I have looked throug in alldata shows it being connected t...
2001 GMC Sierra 2500 HD SL 6.6L No Start, Cuts out VIN: 1GTHK29131
After new injectors truck runs 100% but intermittently dies out, pump primer starts up. Somtimes in the morning, will also have no start. Pump hand pump and starts fine. Dealer said not their problem. Had in shop for two days, could not make it act up nor coul...
2003 GMC Yukon XL 1500 SLE 5.3L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on, spark knock VIN: 1GKFK16Z43
vechicle came in for at with 60794 miles on it for a maintnece flush on trans and fuel filter replacement, oil change and balance of tires. after the truck left the customer drove a few short miles and the check engine lgith came on and started to missfire. he... Trouble codes: P0300
1992 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX53L12
2 MONTHS ago this pontiac came in for no start, found cam sensor pick up missing from sprocket, r&r timming chain, cam and crank sensor and water pump, installed new ignition coil and coil module due to it leaking, then we replaced the computer for car runing ...
1997 Pontiac Bonneville SE 3.8L Hesitation, Surge, Misfire VIN: 1FTEF14N5K
help this women ran out of gas and then she filled it and drove it a few days and engine light came on p0300b,runs like @%$$&.changed fuel filter added $12.00 injector cleaner and full tank of 93 octane two tanks later same running condition anyone have this b... Trouble codes: P300
1998 Pontiac Trans Sport Montana 3.4L Air Bag VIN: 1GMDX03F2W
This vehicle has the air bag light on. The code that it shows is B1040. I cannot find a definition of code B1040. Does anyone have any info on this code. Thank you
2005 Saturn Ion-2 2.2L Hesitation, Stall, MIL Lamp on VIN: 1G8AN12F55
2005 Saturn Ion (cobalt) with a 2.2 Ecotec which sets a p0171 all the time. Car has 4,000 miles on it. Came from a wholesale car lot full history not known. For some reason they said its not under factory warranty anymore (thats why its here) Original came i... Trouble codes: P0171

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Roadmaster 5.7L all interior electrical VIN: 1G4BN52P3R
thanks to all who replied, this was a very simple fix and a large oversight on my part. i had power to all of the fuses in the veh. but nothing worked: pwr seats, lights, radio, i/p cluster, door chime etc. measured 12+ volts at the battery terminals. what i d...
1996 Cadillac DeVille 4.6L crankcase vacuum VIN: 1G6KD52Y6T
majority say intake gaskets failed. better inspections found that the hose i had vacuum at is normal. it is the fresh air port for the pcv. that was not a problem. the symptoms that lead me to believe a problem existed is the fact that o2 sensor readings chang... Trouble codes: P0138.
2003 Chevrolet Silverado 2500 HD 6.6L Tachometer VIN: 1GHK23123F
This one is fixed. Thank you to all that replied it was the instrument cluster. I guess the tach just burnt out.
2003 Chevrolet Express 2500 6.0L door locks VIN: 1GAGG25U13
We are closing this post without a real fix. During the process of looking for frayed wires the problem went away and has not come back. As we stated before the problem was intermittent but it has been returned to the customer for two weeks now without any pro...
1990 GMC Tracker 1.6L No Start, Stall VIN: JGTBJ18U3L
Hi, most replies I received on this vehicle was a defective ecm. I was not able to fix as customer is unwilling to try a used or rebuilt unit. thanks for all the help. dale
2001 Pontiac Grand Prix GT 3.8L Blower sppeds VIN: 1G2WP12K01
Well sometimes I have the habit of putting the cart before the horse,I want to thank everybody who replied to my request.Before I posted, I had already done a voltage drop test,Checked the grounds with a wiring diagram and checked voltage to and from the blowe...
1994 Saturn SC2 1.9L rf headlight VIN: 1G8ZH1571R
found wires between radiator worn through replaced wiring and laa is ok now
1995 Saturn SL1 1.9L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1G8ZH5283S
Thanks to all who replied. Harold had 1/2 the problem. As i stated o2 sensor would be @0 untill short term wnt to max. Checked o2 voltage at sensor & found it was not the same as seen on scanner. Checked grounds for pcm. Found 400- 1000 mv on most wires. 1000 ... Trouble codes: 43 (esc module or sensor circuit problem- reoccurs), 44 (lean exhaust- did not return), 74 (info flag-coolant temp/ transaxle temp- did not return), 52 (info flag- battery volys out of range- needed alternator- repaired), 27 (quad driver module fault- did not return).
1997 Saturn SW2 1.9L Vent temp VIN: 1G82K8274V
Thanks for all the replies. It turns out it was overfilled with oil. When I removed the lines to flush the system, oil just poured out onto the floor. Flushed evaporator, condenser and lines. After recharged, it put out a cool 48 F at vent. Good enough.
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