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Prev Professional Automotive Repair Technical Discussions for March 1, 2005
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Open Help Requests for GM
Help Request Answers
1993 Buick LeSabre Custom 3.8L Cuts out, Stall
car came in with blown engine. replaced engine and will not stay running, it starts and runs about 3 sec. then shuts off. fuel pres. ok, ignition ok, we had key checked at dealer, they said it was the correct key code for this car.
1996 Buick Regal 3.8L RPM Limiter VIN: 2G4WB12K3T
Customer lives in Oklahoma Panhandle and complains that rpm limiter shuts vehicle down at 106mph. Driver is highly trained for this type of driving and has several relatives in law enforcement in that area. We know the pcm will need reprogrammed to correct thi...
1981 Cadillac Seville 4.1L blower motor VIN: 1G6AS6940B
blower motor inoperative had a bad ground on the programmer and display unit causing no lights on display replaced power module due to flow chart for an 82 dont have anything for an 81 if anyone can shed any light on this or possiblily has the correct year flo...
1992 Cadillac DeVille 4.9L No Start, Poor Idle Quality VIN: 1G6CD53B1N
I have a good one here!!! This car came in for a no start. You can tell that someone has been working on it before i got it. the starter, alternator, and tuner up has been done. I have proper fuel pressure, but fire is not right. It would one spark one time wh...
1995 Cadillac Seville SLS 4.6L Cooling Systems VIN: 1G6KS52Y5S
We have to replace two leaking heater hose metal tubes on the back of the engine. They run from the reservoir bucket on the passenger side of the vehicle along the firewall to above the transmission on the drivers side. There is absolutely no room in between t...
1999 Cadillac Seville SLS 4.6L Cuts out, Stall VIN: 1G6KS54Y3X
Vehicle starts and runs fine.No codes present. Datastream indicates lean condition. Vehicle dies upon decel and is intermittant. Any help would be appreciated.
1985 Chevrolet Cavalier 2.0L No Start, Cuts out VIN: 1G1JC69POF
morning all. i hope some one out there can help me. car was towed in for no-start. owner replaced: plugs, wires, coil, cap, rotor, module. no change. we checked for codes, none found. we have since triple checked timing, replaced module again, installed re-man...
1989 Chevrolet Blazer Scottsdale 5.7L Cuts out, MIL Lamp on VIN: 1GKEV18KOK
I am posting this for a tech in a nearby town.This Blazer came in with coolant leaks and vacumn leaks from intake manifold gaskets.When manifold was removed it was really cruddy inside.Cleaned manifold and passages and installed new gm gaskets.Now the fun begi... Trouble codes: 44 (lean exhaust)
1990 Chevrolet Lumina 2.5L Excessive Emissions, Surge, MIL Lamp on VIN: 2G1WL54ROL
Hello GM techs, I have this car that came in yeasterday for a intermittent surge & ses light on. I found a sticking egr valve & leaking tbi gasket. Replaced both and road test. Surge is gone but ses light still comes on with dtc 45-rich exhaust. Scanner say o2... Trouble codes: 45 (rich exhaust)
1991 Chevrolet C1500 Cheyenne 5.7L No Start
This is a rebuilder so the VIN is jacked up. The vehicle has ran fine since it was rebuilt about 3 years ago. The owner explains that as he was going up an on ramp the truck stumbled and died. Since then the vehicle will not start. The fuel pump is working pro...
1995 Chevrolet K1500 5.7L housing VIN: 2GBEK19KOS
Cust had truck towed in off highway, was slipping, fluid was discolored, and smelled burnt. We removed it, and rebuilt here in our trans shop. After install, cust broke down on highway about 150 miles away, heard a bang, quickly lost drive. We towed truck in, ...
1997 Chevrolet Cavalier LS 2.2L theft lamp VIN: 1G1JF52T4V
Hi there, car in two months ago for intermitant no start-have to wait 10 mins, we replaced lock cylinder and coded key from dealer. relearn procedure carried out(leave key on for 10 mins). car starts-theft lamp stays on. I suspected this may have been how the ...
1998 Chevrolet Malibu 2.4L MIL Lamp on, GAUGES FLUCTUATE VIN: 1G1ND52T3W
sensor as well. now sometimes when starting the car the gauges will fluctuate and ck engine light will come on w/ no codes stored. we did weld the cat on...have we damaged the ecu??? thanks wayne [...]
1999 Chevrolet Silverado 1500 5.3L Steering VIN: 2GCEK19T5X
Hello everyone got this pickup that makes a growl or hum that comes out of the steer colum and only makes noise when turn left only, it is defenitly comeing out of steer colum i seen this posted before, if any one has seen this or had same problem send me some...
2000 Chevrolet Blazer LS 4.3L transfer case VIN: 1GNDT13W2Y
I have a 2000 Blazer that came from a dealership wholesaler. When it is shifted into four wheel drive it feels like there are two different gear ratios in the front and rear differentials. it engages fine, then the front wheels start to howl like the are being...
2000 Chevrolet Impala 3.8L No Start, Cuts out, Stall VIN: 2G1WF55K4Y
Vehicle driver complained of intermittant stalling will restart most times. When it stalls the brake indicator, ABS light, and "Battery" on message center comes on. The first time the vehicle was in the shop had Codes P0230 & P0748. Performed flow chart for P... Trouble codes: P0230 (Fuel Pump Control Ckt Problem), P0748 (Press Control Solenoid Elect), C1233 (R/F Wheel Speed Sensor Short/Open)
2000 Chevrolet Silverado 1500 4.3L Stall VIN: 1GCEC14WZY
crank sensor checks fine Trouble codes: P0339
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, MIL Lamp on VIN: 1GNDT13502
Actually have 2 of these vehicles with the same problem. Have replace the controller/solenoid and the sensor for the exhaust cam - have had the computer reflashed according to a GM bulletin. Fresh oil change with the correct viscosity oil did not help. No help... Trouble codes: P0014 (Exhaust cam position system performance)
1991 Geo Prizm GSi 1.6L MIL Lamp on VIN: 1Y1SL5450M
Vehicle came to us with the cooling fans running all the time,the transmission would downshift at highway speeds when the temp. guage would drop. Found a broken wire between the the cooling fan thermal switch and the relay. repaired the wire and the cooling fa... Trouble codes: 21 (oxygen sensor circuit/open or short circuit)
1996 GMC C2500 Sierra SL 5.7L Misfire, won't shift VIN: 1GTFC24R6T
I'm posting this for a friend who has maintained this truck since it was new. It developed a slight miss which has gradually gotten worse to the point that it's undriveable now. The truck will idle fine and everything looks good on the scope (modis) both prima... Trouble codes: P0300
1996 Oldsmobile Cutlass Ciera 3.1L air bag VIN: 1G3AJ85M7T
Hi all and thanks in advance for the help. After installing turn signal cancelling springs and reassembling,the air bag light flashes 7 times when you turn the key on and 6 times after it is started. It performs a system diagnostics check and all is ok. My que...
1996 Oldsmobile Cutlass Ciera 3.1L Misfire
I have to apologise for the lack of VIN. Sometimes I decide to post at home after work and the vehicle is at work. I first began working on this gem in december. The usual intake job that we are all familiar with. At the time the service engine light was on wi... Trouble codes: P0300, P0441
1999 Oldsmobile Silhouette Premiere 3.4L Excessive Emissions, Hesitation, Cuts out, Stall, LACK OF POWER VIN: 1GHDX03E2X
GM GUYS HELP!!! This Olds is from out of town and broke down on the highway. The symptoms are cutting out, loosing power, and stalling. The vehicle has the ymptoms of running out of fuel, the fuel presure is good even when cutting out, loosing power, and stal...
2000 Oldsmobile Intrigue GLS 3.5L No Start VIN: 1G3WX52HXY
this vehical was towed to the shop with a crank no start, i found that there was no fuel pressure so i checked my powers and grounds all was good so i replaced the fuel pump. the car ran good so we let it go. there was a complaint about an intermittent no cran... Trouble codes: B1422 (u1016- loss of pcm power), U1016 (loss of pcm power)
1995 Pontiac Grand Prix SE 3.1L Cable/Shifter VIN: 1G2WJ12N2S
We towed vehicle in because gearshift cable was broken. After installing new cable we noticed that it was very hard to move the shift lever. We removed the cable and the switch from the transmission and the problem is internal. I searched the archives and didn...
1996 Pontiac Bonneville SE 3.8L interior lites VIN: 1G2HX52K5T
interior lites stay on for ten minutes ,which is a safety shut off limit ,should stay on fo twenty five seconds , for exiting vehicle . have checked all door switches by disconecting latch and key cylinder switches ,but interior lites stay on for ten minutes ,...
1997 Pontiac Grand Prix GTP 3.8L Unknown VIN: 1G2WP1219V
Vehicle came in little low on trans fluid, about 2 1/2 quarts, MIL on and a complaint of a shudder or surge during shifting after warmup and usually going up hill. Filled trans fluid and test drove vehicle and confirmed problem. Scanned computer and found code...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L Electric Window, door lock, power mirror VIN: 1G4HP5K9Y4
Thanks to all that replied, Phil [...] at BK Auto Service for information about the routing of the wiring harness. We did a continunity test on the seria...
1984 Cadillac Fleetwood Brougham 4.1L Excessive Emissions, MIL Lamp on VIN: 1G6AW6987E
Thanks to everyone woo replied.Some said to check air filter but it was off of the car during most testing.One said to verify O2 operation by creating large vacuum leak.I had allready tried this & readings did go down so O2 was working properly.Most others wer... Trouble codes: 45 (system rich).
2005 Cadillac STS 3.6L keyless start VIN: 1G6DW67785
Thanks for your replies. As suspected the problem was in the customers garage. He didn't have to replace his garage door openers. We had a radio communication tech go out to his garage and measure and determin the source of the interferance. It ended up his ga...
1993 Chevrolet K1500 Cheyenne 5.7L limp mode VIN: 1GCEK14K6P
everybody seem to think the problem was b+ pin e and youall where right.paul said to jumper b+ and see what happens.Well it shifted fine on the hoist.This 93 uses the old style ignition switch.this one is powered through the fuse block.I checked it and had bat...
1997 Chevrolet K1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEK19R7V
vehicle has not yet reurned - will update fix when returns - thanks to all who replied Trouble codes: P0300.
2000 Chevrolet Silverado 1500 4.3L Misfire VIN: 1GCEK14W8Y
i first want to say thanks to the guys that wrote back. we did install an aftermarket cap and rotor but do to the emails i recieved we replaced it with a factory cap and rotor and problem went away. thanks alot again for your replies. thanks iatn.
2000 Chevrolet Express 2500 5.7L Trans/ Engine VIN: 1GCGG25R7Y
HI IAtn members, They just (aamco0 gave us the van back and said that the 1st tcc solenoid was bad so they put in the second one. We just got the van back 2/28/05 and the customer is driving for now. Sorry for the delay in response. Thanks to all that replyed ...
2001 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCDT13W41
Hello, Thanks to everyone for their offer of help. I messed up from the very beginning, transposing a 1 and zero in the fault code. And wrongly sent out a message that became misunderstood as an EGR fault problem. ***! I apologize. ***! The simpleness of... Trouble codes: P0401 (2ndary air injection).
2002 Chevrolet Gruman P30 6.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge VIN: 5B4KP42Y42
Thanks for all who responded! The fix for this was the injector pump. Once it was replaced the truck ran great. Thanks for all the replies.
2003 GMC Sierra 2500 HD SLE 6.6L long crank time VIN: 1GTHK23113
a couple of people said to check fuel pressure well we couldnt get a fitting to use with our fuel gauge , some said there was a problem with the injectors with this model and we had the customer take to dealer and they are replacing all the injectors thanks fo...
1994 Pontiac Grand Prix SE 3.4L MIL Lamp on VIN: 1G2WJ12X6R
You people fixxed it again. There were 2 separate problems. The warm engine problem (p1640) was the evap. sol. It would go 'open' when underhood temps were hot enough. The first couple times I checked it it was not hot enough. The cold problem (runs real bad) ... Trouble codes: 1640 (quad driver a).
1998 Pontiac Grand Am SE 2.4L Oil Pressure/Compression/Vacuum VIN: 1G2NE52T5W
Thanks to all who helped me in fixing this Pontiac! Ended up being a series of problems. Installed a new timing chain kit, along with new hydraulic tensioner since I was worried about car being in time. Realized I had high oil pressure but wanted to try new ch...
1998 Saturn SL1 1.9L Engine oil in coolant VIN: 1G8ZH5284W
Thanks for all who replied. All of the replies I received were correct. It tuned out that the cylinder head was cracked just below the Cam Journals. We replaced the cylinder head with New one, replaced all the hoses, flushed the radiator and replaced the water...
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