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Prev Professional Automotive Repair Technical Discussions for February 12, 2007
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Custom 3.8L heating vents VIN: 1G4HP52L7R
This car came in with heating problem- we test drove the car and vent temp. was low- replaced thermostat and flushed the coolant- vent temp. now at 115 F / test drove again- the right vent stayed at 115F but the center and left side started to get cold- got ba...
1997 Buick LeSabre Custom 3.8L Cuts out VIN: 1G4HP52K5V
Hi Group: Need some help on this one. This guy has been to four other shops including the dealer. This problem occurs randomly, only in closed loop, and usually when conditions are damp or very cold. We have not been able to get this car to act up in the shop ...
1996 Cadillac DeVille 4.6L battery VIN: 1G6KD52Y7T
car came in for no start. battery was dead. charged the battery and checked for draw. it had a 600 mA draw. traced it to the comfort fuse in the trunk. started unplugging modules and when i unplugged A/C programmer it dropped to 200 mA and in about a minute it...
1997 Cadillac DeVille 4.6L airbag VIN: 1G6KD54Y5V
Hello all we have a 97 Deville which came in with a check airbag system displayed we scanned vehicle and found B1126 - Driver Deployment Loop Open we have checked all fuses and wiring we knew of to no avail we don,t have much data availible to us at this time ...
1996 Chevrolet C2500 5.7L No Start VIN: 1GCGC29RX7
hi all this truck was towed to my shop. It has 60psi of fuel pressure and i check to see if it had spark and it does. I did inspect the spark plugs and some were damp with fuel and others were dry. I replaced the coil with a new one and still would not start. ...
1997 Chevrolet K1500 5.7L steering VIN: 1GH6R534W3
i have checked with the archives with this problem,and i have this 1997 chev 1500 4x4 pick up,came in with stiff steering,we installed a svo switch on the back of the steering pump and a steering position senor,and still no change. the steering is so stiff tha...
1998 Chevrolet Blazer 4.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GNDT13W9W
Ok everyone this one is winning the battle against me.Vehicle came in with mil lamp on with codes po151 and po300.ck o2 sensors found bank 2 sewnsor 1 was at .4mv hot replaced sensor and it was reading ok untill it warmed up then it started to drop out to neve... Trouble codes: P0151, P0300
1999 Chevrolet Venture 3.4L abs , brake warning light VIN: 1GNDX03E9X
this venture came in with 3 warning lights, the abs, brake warning lights and an air bag light, these are the following codes: c1216 electronic brake control relay coil, ckt open c1256 lf motor circuit open b1030 rh pretens deploy loop resistance high i have s...
2001 Chevrolet Silverado 1500 5.3L 2-3 shift inop VIN: 1GTEK19T21
When you start this truck cold it will shift great up to 4th gear and overdrive and TCC, but then with in 1 minute it will drop to second gear and stay there. When I try to command a 3rd gear shift it won't shift until 1 minute later and then it all works perf...
2002 Chevrolet Blazer LS 4.3L Misfire VIN: 1CHCS1BW02
while viewing misfire data and holding throttle at approx 1500 rpm, cyls # 1 and # 4, will show misfire. intt one or two other cyls # 3 or # 5 will show misfire, (but only one or two misfires) on a road test no misfire is felt. the pcm has the latest software.... Trouble codes: P0300
1992 Geo Storm 1.6L Hesitation, Cuts out, Stall, MIL Lamp on VIN: J81RF2365N
Thanks in advance for any help you can give. This Geo came in on a wrecker and didn't run at first. We checked the fuel pressure and the volume, both were good. We then checked the system with a scanner and found two codes, a 110 and 140 both were called undoc... Trouble codes: 110 (undocumented code), 140 (undocumented code)
1994 GMC Jimmy SLE 4.3L Poor Idle Quality VIN: 1GKDT13WXR
when you start the truck cold it starts right up. in about 2 seconds it will start to rev up and down looking for an idle. after about 30 seconds it will level out and run perfect. start after start. no drivability issues going down the road at all. good accel...
1996 GMC Sonoma SL 4.3L fuel gauge VIN: 1GTCS14X2T
we put in a new fuel pump assembly because the pump quit working. after that eveything was working o.k. the customer called a back after two days and said the fuel gauge does not move. he put in a fill tank of gas ran the truck for 200 miles,and gauge still di...
1998 GMC Savana 3500 6.5L Cuts out, Stall, no start VIN: 1GTHG35F4W
hey guys. Don't work on much desiels so i can use some help with this one. This van came in with a bunch of fuses missing under the hood and a fuse blown. I replace all the missing ones and replace the bad one and the truck started up. The bad fuse was located...
2000 GMC Yukon XL 1500 SLE 5.3L heater VIN: 1GKFK16T91
hello On this truck we cannot get hot air out of front vents but we do have hot air out of rear vents. the water temp is 195-210 we have back flushed heater core and found it was flowing great. the air temp coming out of front vents is 90-130% but cools down ...
2001 GMC Yukon SLE 5.3L defroster & vent VIN: 1GKEK13TOY
Defroster & vents will not swop when you turn the dial on the control panel, replaced actuator motor and climate control module, did not fix problem. This is a computer controlled system. Everything else works, just will not swoop from vent to defrost. No code...
1999 Oldsmobile Intrigue GL 3.8L Auto HVAC controls VIN: 1G3WS52K1X
Auto HVAC controls inop , intermittent, are inop now. The illum works OK. Also, the automatic headlights are inop same time as auto HVAC. When one works, so does the other. The auto parking lights do come on. Have cleaned the following grounds- 2 on rad tie ba...
1999 Pontiac Grand Prix GTP 3.8L Poor Fuel Economy VIN: 1G2WR5210X
hello to all i'm looking for some help on this one. this is my personal vehicle.the problem is that on my scanner (snap on modis) their is a pid that say's ignition mode [yes]. according to the scanner this pid should have [no]. as far as i know when pid say's...
2003 Saturn L200 2.2L compressor VIN: 1G8JU54F33
Vehicle came in with the a/c compressor clutch not engaging. Checked for codes and found U1016, U1088,U1096,U1153 in the body computer. Clear all codes, the compressor clutch will not engage at times. If you cycle the the ignition switch it will engage, run fo...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L Cuts out, Poor Fuel Economy, MIL Lamp on, no serial data VIN: 1G4CW52K6S
First I want to thank everyone for all the good information. As it turns out it the ECM was the bad and the reason I could not get any serial data. After replacing the ECM I found the car to have high integrator and block learn memory readings over 150 when cr...
1990 Chevrolet S10 Blazer 4.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy VIN: 1GNCT18Z6M
well it still runs like poo.I have tried everything and it keeps laughing at me. I have another truck that has become the help me parts for this blazer. I have even swaped tbi and computers and it still acts weird. I just noticed a post about scanners keeping ...
1991 Chevrolet S10 4.3L clutch VIN: 1GCCS14Z9M
This truck is still here. I've gotten 50 replies, I've talked to Identifix and 2 Chevrolet service managers. Most gave good info but nothing has helped. I have replaced the clutch disc, pressure plate, throw out bearing, pilot bushing, clutch fork, ball stud...
1994 Chevrolet C3500 6.5L No Start, Cuts out, Stall VIN: 1GBHC39F2R
Well everyone was very helpful. Our plan was to get the remote module from Heath's Diesel, but the customer did not want to spend the money. We changed the module (from O'reilly's). Haven't had any problems yet. So is it fixed? We don't know and we have our do... Trouble codes: 13 (engine shutoff driver fault), 41 (brake switch fault), 99 (pedal position 2 ref fault).
1996 Chevrolet Blazer 4.3L Rear Lift Gate VIN: 1GNDT13W3T
The customer has not returned as of this date - but the replies I received pretty much confirm what I suspected - that the inner panel will most likely be damaged during removal to fix the latch. Many thanks to those that responded. If I do get the opportunity...
2001 Chevrolet Suburban 1500 5.3L Misfire VIN: 3GNNFK16TX
I have performed a full tune-up with plugs, wires, and inj/ind flush. This customer has left with the vehicle and has not come back with any concerns. I believe the concern was over pursued. The misfire counters were built up over a 25,000 miles. Most vehicle ... Trouble codes: P0300.
2001 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCDT13W81
We got this one fixed. We ended up reprogramming the PCM again. We then tried to perform the case relearn procedure. This did not work, we retried the case relearn procedure. The third time was a charm. I do not understand why it took 3 times until the PCM rel... Trouble codes: P0300.
2006 Chevrolet Silverado 2500 HD LT 6.0L door locks VIN: 1GCHK23216
Thanks of the input...since the customer does not want the power door lock feature completely disabled, I hesitate to start pulling pins out of the BCM, however 1 reply indicated that GM will reprogram the BCM, with some customer action required. I think our n...
2004 Pontiac Grand Prix GT2 3.8L Poor Idle Quality, Stall, MIL Lamp on VIN: 2G2WS52214
We reprogrammed the PCM with the newest software and cleaned the MAF sensor and cleaned the throttle bore. Put one bottle of Iso-Heet in the fuel tank and sent it on its way. I checked the connector at the throttle pos. sensor wich is the accelerator peddle on... Trouble codes: P0068 (Actual Throttle Position not as expected), P0010.
1997 Saturn SL2 1.9L Heating system VIN: 1G8ZK5278V
Thanks to all who took the time to read the post & reply. Actually none of the replies had seen what I found to be the ultimate cause of the problem. The heater hose coming off of the intake manifold attaches to an elbow fitting off of the manifold. This fitti...
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