I hope my Discussion Title isn’t too over the top but that just about sums up my feelings over this matter. I recently purchased a 2001 Chevy Blazer LT and it is a pretty spotless vehicle considering it’s age. I have owned Blazers in the past and generally speaking, I really do like them. Not long after I bought my latest Blazer I noticed my gas gauge was giving me some erratic readings. If I put the Blazer in park or neutral and if the gas in the tank hasn’t had time to stop sloshing around, I notice that the gauge will jump all around and seem to react almost instantaneously to the sloshing ocurring in the tank. In other words there seems to be no dampening of the gauge needle to smooth out the reading. If I were to put the Blazer into any gear (this includes reverse), the needle stops right where it was at the time I put it into gear. From there, the gauge seems to reestablish itself and I believe the gauge thinks it is reading correctly and continues to drop as I use fuel. The problem is that if the gauge reestablishes itself incorrectly at a higher than actual reading, I run the real risk of driving my nice, clean, undented, shiny, lying Blazer right out of gas. In fact, I did do just that. I brought the vehicle back to where I purchased it and I paid to have a fuel sending unit replaced. They also replaced the fuel pump. Both were AC Delco parts because I was told not to buy aftermarket replacement parts for this particular repair. The repair was done a couple of months ago. Needless to say, there was no change to my problem and the dealer, being a small Mom and Pop type was a bit perplexed and it cost me $530.00 of my hard earned cash. The dealer then called a local GM dealership and was told that they needed to reflash the computer on the Blazer. I brought the Blazer back to my dealer who then dropped it off at the local GM dealership and supposedly reflashed the computer. I’m guessing they were actually were reflashing the program in the non-volatile memory section of the computer assembly. I picked up the vehicle and I still had the problem. So now I’m reaching out to the millions upon millions of people who tune in on a fairly regular basis to the Car Talk brothers. Can anyone tell me what the problem is and what the fix is? I’ll owe you and Click and Clack big time.
( Lou Carta)