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Prev Professional Automotive Repair Technical Discussions for July 7, 2010
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Custom 3.8L No Start, Stall VIN: 1G4HR52L0R
Hello all, this car was towed in saying it died going down the road. I go out, check codes and give it a once over under the hood. Nothing out of the ordinary, and above codes found. I am automatically thinking crank sensor with the p1361 but run through the b... Trouble codes: P0341, P1361, P1565
1997 Buick LeSabre Custom 3.8L temp door actuator VIN: 1G4HP52K9V
The temperature door actuatar will not operate. I have 12volts on the brown wire which is on number 10 pin. The voltage varies on the blue wire which is on pin number 8. It various with the control on the dash from hot to cold. The voltage various from .5 to 1...
2002 Buick Rendezvous CX 3.4L Starting VIN: 3G5DB03E62
This vehicle will shut off while driving or sometimes at idle.It blows fuse # 42 ( ign switch and theft deterrent).It will not start again unless you jump the starter.Then it will continue to start until next time it acts up.If you do not jump the starter and ...
2005 Buick LaCrosse CXS 3.6L Traction Control,Abs,Veriable Effort Steering VIN: 2G4WE56765
Customer brought wifes car in,she told him that the traction light and abs lights came on.Service abs,trac.off and service veriable effort steering messages on in info center.Happened once to her...Found abs code P0050,r/rear wss malf.Un able to verify sensor ...
1997 Cadillac DeVille 4.6L Poor Idle Quality, MIL Lamp on VIN: 1G6KS52YXV
Car has an intermittant high idle. Code p0122 sets, tps sweeps as it should. IAC counts go to 190, fuel trim right bank +18, fuel trim left bank -3. Why would IAC go to 190 if right fuel trim is +18? The cadillac dealer cleaned throttle body and did a bg fuel ... Trouble codes: P0122
2000 Cadillac Eldorado ESC 4.6L Hesitation VIN: 1G6EL12Y8Y
This cadilac came in with a hesitation and a check engine light on. scanned for codes and came up with po300 , p0741 and p1860. I looked in fix database and transmission codes are common with a bad torque converter and tcc solonoid. My question is the po300 mi...
1994 Chevrolet S10 Blazer 4.3L compressor VIN: 1GNCT18W9R
HELP SOMEONE,cannot find ac relay.I have searched all over truck even top of trans.They say its on cowl.Found three relays,none of them are it.Tried to toggle switch to listen for clicking noise of the relay contacts with no sucess.Unhooked all three relays an...
1997 Chevrolet Blazer 4.3L fuel guage VIN: IGNDT13W1V
This blazer came in for an erratic fuel guage. At first my thoughts were a bad pump module. But after some inspection and testing (the pump module is only 10 months old and it's a Delphi unit), decided the problem was in the cluster assy. My reason for this wa...
1999 Chevrolet K1500 Suburban 5.7L No Start VIN: 3GNFK16R1X
Hey GM guy's, I thought I would throw this out there and see what comes back. Got this from another shop whom changed all listed parts. They even put in a second fuel pump as they traced to know fuel. I got it in and put fuel pressure gauge on it and pressure ...
2000 Chevrolet Express 3500 5.7L Surge, Cuts out VIN: 1GAHG39RXY
Vehicle came in as a no start. Ran fuel pressure and volume test, all ok Tuneup was original. replaced cap rotor plugs and wires. replaced fuel filter. Got running. Attempted to test drive speedo jumps around, sometimes pegs at 100mph. This van has no codes. C...
2000 Chevrolet Malibu LS 3.1L Lack of power, warm VIN: 1G1NE52J2Y
This car always runs smoothly on all 6 cylinders. After reaching 180 degrees the power drops way off. The shortage of power feels as if the cat is totally plugged. The exhaust back pressure is minimal {1/4 of a lb} back pressure will jump to almost 1 lb when q...
2000 Chevrolet Express 1500 4.3L Hesitation, Misfire, MIL Lamp on VIN: 1GCFG15W3Y
This car originally came in on a tow truck with no fuel pressure. We replaced the fuel pump and it started right up and had 65 pounds of pressure at idle. It spit and backfired a few times after we started it. We found that the mass air flow boot was loose and... Trouble codes: P0339
2001 Chevrolet Silverado 1500 5.3L abs VIN: 2GCEK19T01
This truck has the classic low speed ABS activation issue. However, the traditional fixes have not worked. What else can cause this? Nothing we have done has helped, if anything it is worse. We could see one of the front wheels dropping out early on the scanne...
2002 Chevrolet Corvette 5.7L Unknown VIN: 1G1YY22GX2
This Corvette came in for a clutch replacement. The customer diagnosed a bad release bearing himself because there was a slight vibration in the clutch pedal which increased with engine rpm. I replaced the clutch disc, pressure plate, flywheel, pilot bearing (...
2004 Chevrolet Venture LS 3.4L Drive-axles VIN: 1GNDX03E04
Customer wants to convert this van from Front Wheel Drive to Rare wheel drive or All wheel drive then add a electric motor to shaft to convert it to Hybrid, anyone ever came across this, what shall I take into consideration, is it possible?
2005 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GCHC23U55
Hi All This vehicle is low miles but well used. The lean codes when cleared return within just a couple of minutes. When testing with the Tech 2, after resetting the fuel trim, the short term jumps up to 10-15 and the long term can be observed going up to max ... Trouble codes: P0171, P0174
2007 Chevrolet Aveo LS 1.6L Hesitation VIN: KL1TD56667
All test from identifix have been proformed and still no improvement in the vehicle proformance. The check engine light will come on and lock out the shifter. All codes have been cleared and vehicle returned to customer and the cat came back three dayd later w... Trouble codes: P2138 (Acceleration pedal position sensor 12 correlation), P2106 (Throttle control system proformance---throttle limitation active), P0222 (Tp sensor 2 circuit low voltage------with tac), P2110 (Throttle actuator control system--forced limited engine speed), P0123 (Tp sensor circuit high voltage), P2135 (Tp sensor 1-2 correlation ----- wtf)
1998 GMC Savana 2500 4.3L No Start VIN: 1GCFG25W4W
i am helping out a friend of mine. who own a rental company. he has this van for 4 years, and has been sitting, when he got it it did not have a transmission in it, he installed a used transmission. did a complete tune up, plugs wires, cap and rotor. drained o...
2005 GMC Sierra 1500 SLE 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTEC13T05
Thanx in advance for any help on this one. came in misfire checked plugs wires coils,cleaned mas air sensor it kind of felt like a vacuum leak sprayed none found thought intake may be leaking underneath replaced intake gaskets no help compression good pulled f... Trouble codes: P0300 (Misfire detected)
1991 Pontiac Firebird Formula 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G2FS2384M
PCM cannot maintain +5V when both TPS and MAP are connected. Sensors are new, PCM replaced, per customer, by other shops twice. Checked PCM ground and +12V ampacity. Both OK. Isolated all PCM I/Os except +12V and ground and affected circuits. No change. Built...
1998 Saturn SL2 1.9L Unknown VIN: 1G8ZK5273W
Customer had a problem where engine did not crank == It was very intermittant so we replaced the MLP or Range switch -- after that had shifting problems and hard engagment (clunk into gear) with code P0706 (Invalid Data Transaxle Selector Switch) Owner of th...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick LeSabre Limited 3.8L Surge, MIL Lamp on VIN: 1G4HR53L5P
Hi, First I would like to thank those that responded. Some good sugestions were made. There was more than one problem with the car and my diagnostic routine, for starters as suggested and also posted in Identifix there was a wrong bulb installed in the t...
1994 Cadillac Fleetwood Brougham 5.7L No Start VIN: 1G6DW52P2R
Thanks too all we found the large slot on the back and car started and all is great again thanks.
2005 Chevrolet Venture LS 3.4L No Start, Cuts out, Stall VIN: 1GNDV03E55
well,after spending 2 days diagnosing this car i fell so happy about it!i knew that cam signal has to do something related to the crank sensors problem.it was our little budy that always drive us nuts when come to an electrical problem,has 2 wires chewed at th... Trouble codes: P0336, P0386, U1000.
2000 Geo Prizm 1.8L Hesitation, Stall VIN: 1Y1SK5285Y
Thanks all! (Rusty) Checked fuel trims & all were high. Cleaned MAF, no change, replaced injectors & Thank You Lord it fixed it. Runs like a top!
1997 GMC Safari 4.3L Blower Motor VIN: 1GKDM19W9V
Thanks for the replies. It turned out that the blower motor resistor was needed to restore function to blower speed #1 only. Restoring function to speeds #3 and #4 required tracing the open circuits to the heavy red wire and the light blue coloured wire betwee...
2001 GMC Yukon XL 1500 SLT 5.3L ride control VIN: 3GKFK16T41
Found a company online called Suncore Industries. They remanufacture air suspension components, as well as sell conversion kits. they supplied me with resistors that will go inline where the shocks used to be.
1998 Pontiac Trans Sport Montana 3.4L pressure/return lines VIN: 1GMDX03EXW
Gentlemen The car a/c works fine and is gone. I had replies which gave me the info I asked for. One suggested running a fan at the front of the car which I did and as the system started to operate there was some ice build up but after aprox five minutes it ...
1998 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T1W
As I stated, I did have injector pulse and fire, but obviously not enough. We installed a crank sensor and it started! After the third start the theft light went off. I surmise the theft light was on cause it wouldn't start, while it should have. I thank all o... Trouble codes: B1014 (R code unprogrammed).
2000 Pontiac Grand Prix SE 3.8L key wont return VIN: 1G2WJ52K2Y
Thanks to all you guys for your help.it was the BTSI switch witch most all of you assumed it was.The candy that fell down in the shifter,coffee,soft drinks and everything else that went down there was stopping the solinoid from releesing.With the windows up an...
2001 Pontiac Bonneville SE 3.8L unknown VIN: 1G2HX54K41
This one ended up being a relatively easy fix. As it turns out the passenger side radiator fan was not working. It must have been letting the refrigerant going through the condenser not fully convert to a liquid. The fan relay was missing, installed a new rela...
2001 Pontiac Montana 3.4L Poor Idle Quality VIN: 1234567899
markland was wright it is a worn cam .we are going to just change engine do to the amont of kms Trouble codes: P0300.
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