I know myself and one other member (Okie TD if I remember) both switched from CEL-only to limp-mode right around 2000 miles after the CEL first lit. This happened to coincide with the addition of the P20B9 code to the already-existing P21DD.How long did you get on the CEL before it started reducing engine power?
We have a CEL for the DEF heater - but I don't have the DEF light on, nor any messages stating what you're getting.
The DEF light came on after returning from the dealer and the DIC started flashing. Thats when I checked the codes again and had the P20B9 show up.And when did the specific DEF light come on in the cluster? We don't have that light yet.
Hi Su8pack1,The failed DEF tank heater has put the car in reduced power mode, dropping max speed at every 75 miles down to a max of 4mph. The dealer is working on it but these tanks are hard to locate. We'll see how this one goes. These over the top environmental BS controls are killing our cars. https://youtu.be/32IVl4k7Mcw
That's my concern as well.I mean, what happens if it happens in the middle of a long road trip...
There's been at least one part number change from the factory part - so it's a sign that GM has looked at the failed parts returned to them and made design changes - hopefully improvements. So that the service part functions to design intent.I had my DEF tank replaced (for the heater issue) at around 50k miles (back in early 2015). I took it in, they ordered the tank and installed it the following weekend as that was the earliest time I could fit into my schedule. It literally took them 3 days to get the tank. I'm shocked at how long some of you are waiting for yours. Is it possible your dealers are not contacting the "right" people at GM? By now you would think there would be ample supply to go around. This car is 3 years old now...
Not if purchased May 2013 through August 16, 2013.If you have 11,000 miles, it should be covered under warranty (I'm assuming your dad works at a dealership?).
True. I forget we got ours late in the 2014 run, in May of 2014.Not if purchased May 2013 through August 16, 2013.