I have found a 2006 GMC 2500HD (manufactured 8/05) how can i raise the hood and quickly tell if its an old LLY like in the 05 or the LLY that was built for 3 months that was a detuned LBZ that was used going forward? It has engine code 2 and has the Allison transmission. All points to the LBZ block but I want to make sure. thanks for comments and pictures. please email pictures and comments to [email protected] if it is easier to send than post here. thanks for all the help in advance GRT
How to tell the difference.
- Thread starter grthigpen
- Start date
Easy way to tell is if it has a +/- button on the shifter. All 06 LLYs will have the 6 speed Allison
If It is an 06 and it has a vin code 2, then it is the same as an lbz. The 04.5-05 lly is totally different than the 06 lly.
Can't you tell by the badge too? If it says Duramax Diesel it's an LLY, and if it says Duramax/Allison it's an LBZ?
The badge isn't a totally reliable way to tell. I know a guy with an 06 lly with 6 speed and his just says "Duramax Diesel" like older ones
sent from a galaxy far far away
sent from a galaxy far far away
A 06 lly will still have the old badge. They only started the new badges on lbz's
Yeah this is what I meant...I thought the badge was an easy way to tell the 06 LLY from the 06 LBZ.
Badge on an 06LLY should still be the old style. LBZ got the new style.
As mentioned tapshifter is an indicator.
If the 8th VIN digit is a "2" and the `10th digit is a "6" then it is an 06LLY.
Pop the hood and if you do not see an FICM on the passenger side valvecover, its an LBZ. Also look at the turbo intake horn, LBZ's are much larger than LLY's. The cold side intercooler pipe will also give some indication as well. LLYs come up more towards the fender on that side of the air intake whereas LBZs come from the front more on that side of the air intake. There is also the 4 bolt flange where the intake grid heater is on the LBZ's. LLYs do not have this. The engine fan shroud should also be a giveaway. LLYs do not have the annoying supports everywhere whereas the LBZ's do.
NOTE: In the above paragraph LLY means 04.5-05LLY and LBZ means 06LLY-07LBZ.
That should be plenty to get you in the right direction.
No not the 06LLY, 06LLY is mechanically an LBZ.
Okay below are pictures of an LBZ with EGR delete that I just took. This allows you to see much better anyways. FICM on LLY and LB7 is mounted on front of passenger valvecover above #1 and #3 injectors. You can see both injector lines in the closeup and there is nothing. Also note the TCM differences between the 5spd and 6spd ally. The 5spd is covered under a plastic cover and is much larger than the exposed 6spd TCM.
