Need Help?

1999 Chevrolet Tahoe Base 2dr

1999 Chevrolet Tahoe
Trim Info:
Rear Wheel Drive, 2 Door
14 mpg city / 18 mpg hwy
Other Trims
Do you own this car?
Estimated Mileage
 Miles
Enter current mileage for most
accurate info about this vehicle


Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.

back to question list

Ask the Community

Ask Our Auto Mechanics


April 30, 2013, 3:26 pm

Ricky G
 

Question: what causes a pcm to send out different troubleshooting codes every other day?

I have a 96 chevy tahoe lt 5.7l and its been a few months that the service engine has been on. I got it checked out and i was told it was one or two of its o2 sensors. i have 4 so i replaced all of them just to be safe. The light never turned off. I got it looked at again and then it said it was my CAT. I replaced the CAT with a brand new one and the light still stood on. I took it to get checked again and now it says its still my o2 sensors (bank1 sensor1 lean circuit). I got the light erased to see if it would help and it just turned on again. I went to advanced auto, auto zone, and 2 different neighborhood mechanics to see what was going on because i was noticing different codes being sent out at each place. I have replaced : all O2 sensors, new fuel filter, CAT, mufflers, cleaned out the mas air flow sensor,new plugs, wires, oil, oil filter, air filter and its still the same.


Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to



My Auto Score

See the free AutoCheck score

Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…