mfinksr

R.M., Thanks for the info. I do know the code, but it is fairly generic and it does have emisions implications. The dealer has repeatedly replaced the "cannister" based on the code. Replacing the cannister is not cheap. So just clearing the code seems to defeat the purpose. And since Buick knows of this problem, they should be coming forward with a fix for it. It could be as simple as pulling the ECM fuse or a minor computer program change. And it only happens after several towing cycles, usually around 5.

I bought a 2008 Enclave, mainly because it was towable. And from the first trip, the Check Engine Light comes on after a few tow cycles. I took it to the dealer where they checked the codes and said a "cannister" needed replaced, which they did. Next trip, same thing, same code, new cannister. This went on every time we took the coach out. Finally, the same Service Writer decided there must be something else wrong. After a deeper trouble shooting they replaces the cannister and the wiring bundle that connects it to the computer. Well guess what happened the next trip. Right, "Check Engine Light". This time the Service Writer called Buick engineering in Lansing Michigan. The Engineer replied, "Yeah, that's what the Buicks do. Have the customer get a Code reader and he can reset the light." This did not seem like a reasonable thing to do, because I would never know it I would be resetting an invalid code or if there was a real fault that needed attention. Now, in the 2012 Towing Guide from FMCA, the procedure for all GM Crossovers requires pulling 2 fuses, the 15-amp ECM fuse and the 50-amp BATT 1 fuse. Previously, only the 50-amp BATT 1 fuse was pulled. Will this keep the invalid Check Engine Light from illuminating or is it totally unrelated? (P.S.: The 2012 DINGY TOWING GUIDE from Motorhome Magazine does not mention the 15-amp ECM fuse,)

I bought a 2008 Enclave, mainly because it was towable. And from the first trip, the Check Engine Light comes on after a few tow cycles. I took it to the dealer where they checked the codes and said a "cannister" needed replaced, which they did. Next trip, same thing, same code, new cannister. This went on every time we took the coach out. Finally, the same Service Writer decided there must be something else wrong. After a deeper trouble shooting they replaces the cannister and the wiring bundle that connects it to the computer. Well guess what happened the next trip. Right, "Check Engine Light". This time the Service Writer called Buick engineering in Lansing Michigan. The Engineer replied, "Yeah, that's what the Buicks do. Have the customer get a Code reader and he can reset the light." This did not seem like a reasonable thing to do, because I would never know it I would be resetting an invalid code or if there was a real fault that needed attention. Now, in the 2012 Towing Guide from FMCA, the procedure for all GM Crossovers requires pulling 2 fuses, the 15-amp ECM fuse and the 50-amp BATT 1 fuse. Previously, only the 50-amp BATT 1 fuse was pulled. Will this keep the invalid Check Engine Light from illuminating or is it totally unrelated? (P.S.: The 2012 DINGY TOWING GUIDE from Motorhome Magazine does not mention the 15-amp ECM fuse,)