Quote:
Originally Posted by hugger6933
I will step in the kitchen for a knife and fork to eat some crow after my last post where I once again said I've never seen one I went to GM parts express and plugged in a 00 model 3/4 and it does list the 5.3 I was WRONG and I am sorry if anyone was messed up in any way from my misinformation
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It was an option in 1999 & 2000 to have a LM7 5.3L in a 2500 truck. 5.3L's were never offered in a 2500HD truck. Ive never seen one in a 2500 truck either.
The 5.3/4L80E combo is a whole other can of worms......
99 & 00 LQ4 6.0L are different than 01 & up 6.0L's, The rear crank flange is longer than any other gen III engine, Also the only one to have iron heads.
The longer crank flange was designed for use with the 4L80E transmissions converter spacing. 01 & up LQ4 6.0L's use a spacer to deal with the converter spacing, Because the LQ9 came out with a 4L60E/4L65E
So does a 99/00 2500 LM7 5.3L have a MT1 4L80E behind it.....I dont think so. It would have 4L60E..........Untill someone can show RPOs LM7 & MT1 on the same RPO sheet.....There is no proof.