Randomly Stalls


pretty bad
Typical Repair Cost:
Average Mileage:
114,250 miles
Total Complaints:
4 complaints

Most Common Solutions:

  1. replaced crank position sensor (2 reports)
  2. not sure (1 reports)
  3. replace the mass air flow senor (1 reports)
1999 Pontiac Grand Prix engine problems

engine problem

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1999 Pontiac Grand Prix Owner Comments

problem #4

Jul 042010

Grand Prix GT 3.8L

  • Automatic transmission
  • 135,000 miles


if you run into this problem..... make sure you have the right screws to pull the harmonic balancer.... this is a simple home repair. about 45 mins with the right tools. you will need 1 person to help you lock in the fly wheel with a screw driver. the replacement part is around $25 at any major auto parts retailer. CRANKSHAFT POSITIONING SENSOR.

- Bradley S., Colgate, WI, US

problem #3

Jan 032011

Grand Prix GPT V6

  • Automatic transmission
  • 92,000 miles

So right after Christmas when the weather got really bad my car would randomly shut off. For awhile I just dealt with it, I had my boyfriend's dad and brother look at it but nothing! Their family friend who works for GM couldn't figure it out either. So I looked on here and changed my crank position sensor... which cost me wayyy too much and it didn't fix the problem and my amazing mechanic has a fancy "pre problem" reader and told us it's a mass air flow sensor which is SUPER easy to put in it's right under the cover on the engine but the part it self cost me $145 at O'Reily's. But it has been running amazing for about a year now annnnd my miles went up after I fixed it!

- cateswa, Arlington, WA, US

problem #2

Oct 162011

Grand Prix GTP 3.8L Supercharged

  • Automatic transmission
  • 150,000 miles

I have a 99 pontiac grand prix gtp its been a good car. I really can't complain, I have had little things go wrong with it that didn't cost much at all and they are all common problems that I've seen lots of other grand prix owners have..example,the little l shaped tube that carries coolant that sticks out the side of the engine i think is the intake gasket well that cracked but it only cost like 8 bucks labor 40 not bad then when it rain super bad water fills the passenger floor haven't gotten fixed yet not a big concern cause doesn't happen to often but if someone read this and knows what the problem is I would appreciate if u could help with some info ,but the real reason I'm on here is because I've had the grand prix 1yr now and almost half thu the year the car started randomly stalling the traction control light would say ''traction off'' the rpms drop and engine shuts off sometimes the engine wont shut off the car will just jerk rpms drop tcs comes on and the car will spudder for a min then return back to normal most of the time i know when its going to cut off because of those signs so i am usually able to gt it off the road safely,but it is dangerous and coming very annoying i have heard it is classic signs of the crank position sensor fail if so its not that bad its like $110 parts and labor..what does it sound like to the AUTOBEEF world please help ?????????????????thank you in advance

- mjbigballer, Indianapolis, IN, US

problem #1

Jun 242007

(reported on)

Grand Prix GT 3.8L

  • Automatic transmission
  • 80,000 miles

My Grand Prix would just randomly stall for a few seconds and the Trac Control would come on. This was not easy to figure out. But after looking on the internet, I found the fix. It is the Crank Position Sensor. It costs about 30 dollars and I paid a shop to put it in for a hundred dollars and that fixed the problem. If you have your car run on a diagnostic system, it wont find the problem and you will waste your money. Just get the part and have a shop install it.

- jandre, Lake Mills, WI, US

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