What does the "L" stand for when labeling an engine as a "350L"?

[Eric M.]

I'm trying to order a few parts from the LMC cat. There are 2 different diverter valves listed, one is for the 350, the other is for the 350L. What is the difference? How do i who which one i have?

I have an 80 GMC C3500 pick up.

Thanks,

Eric M.

 

[ct85k10]

3rd letter in the vin code page 12 in the lmc catalog

 

[Eric M.]

3rd letter in the vin code page 12 in the lmc catalog

Ahhh, thank you much.

Now for the next question, there were two 350 engines, the L and M. Anyone know what the difference is?

Thanks,

Eric M.

 

[BadBob]

One is for HD emissions over 8600lbs GVWR. It's also rated about 10hp less, and had about .1:1 more compression.

 

[mosesburb]

Ahhh, thank you much.

Now for the next question, there were two 350 engines, the L and M. Anyone know what the difference is?

Thanks,

Eric M.

"L" is the light duty 350 (passenger car/light truck-low GVW)
"M" is the heavier duty 350 (Usually 8600 GVW and up).
You should havethe "M" motor in your C3500.

 

[Eric M.]

Thanks.
That answers all my questions!

Eric M.