Wanted to follow up with a resolution, BCM was cooked. Plugged in a newly programmed one and the truck fired right up. Haven't tried to flash again yet but BCM was it.
Type: Posts; User: NNBS Sierra
Wanted to follow up with a resolution, BCM was cooked. Plugged in a newly programmed one and the truck fired right up. Haven't tried to flash again yet but BCM was it.
I've cleared it a handful of times but it comes back every key cycle. Can't say I cleared it right before the full write.
Interesting, I'm using the latest version 4.4.4. I've searched around...
Entire write with the original tune was successful just now but same results. No comm with the BCM.
Some more detail from this morning;
- Negative batt cable disconnected overnight, didn't help.
- Checked every fuse that had something to do with the BCM, no issues.
- I can hear the fuel pump...
I poked around inside and was only able to find a 10amp fuse specifically for the BCM but I'll take another look in the morning. I left the negative terminal off for the night so I'll see if that...
Some additional details from the last few hours:
- I can read the ECM/TCM without issue.
- The cluster does not react when writing, (thought you would see some movement here/there)
- Had...
First time fiddling with HP tuners, was going to install some gears and a posi this weekend and wanted to get a feel for flashing, etc. 2007 4.8l 4l80e new body style sierra. Pulled my stock file a...