Front bumpers on Chevy diesel pickups

[DieselDadd1]

On all of the diesel chevy pickups I see going around,all of them have two holes cut in the front bumper.I don't see any gas versions with this kind of a bumper.What is the purpose of these two holes?Is it for more air flow?I see this on the 93'and later chevy pickups.

[battmain]

I have a GMC 6 liter 2500HD and it has the two holes cut into the bumper. Might be for cooling. The oil cooler is right behind the grille and so is the temp sensor for the rear view mirror.

Brian

------------------
2001 2500HD GMC Sierra Ext Cab LB 6.0 4x4 Deep Tinted Glass with Defroster.

[Showgood1]

Yes it is for more airflow.

[DmaxMaverick]

This is supposedly unique to the new HD's and 3500's. The 2500's (LD) I've seen didn't have them. In prior years, it was unique to only the diesels, any size. I'm not certain what year they started, though.

------------------
2001 GMC Sierra SLT 2500HD 4X4 Ext. SB -D/A- INDIGO BLUE - Delivered November 2000

1985 K Blazer 6.2L N/A 500K+ original miles on Engine/Tranny (2 transfer cases, 1 pump, and a few rear ends)
Synthetic Oil!!

[dieseldealer]

All 2001 2500hd`s and 3500`s have the holes. Also the 2500ld and 1500`s with the snow plow prep pck have the holes in the bumper.

[StevoRich]

My 95 GMC 1500 (L56) has the holes in the bumper. I see the GM's all the time with holes in the bumpers but never have noticed that they were gassers.

------------------
1995 GMC 1500 6.5 liter Turbo Diesel
4L80E Transmission
Modified and Kennedized
3" turbo downpipe
3.5" Kennedy Exhaust
Kennedy Chip

[dmax]

I've seen some 2500 (non-HD's)Silverados without the holes. I think it depends on options.

------------------
Mike
2001 2500HD Duramax/Allison Summit White CC/SB Loaded PICTURES
1994 K1500 Blazer 350 Loaded, Flowmaster duals

[dsc]

--------------------------------------------------------------------------------
This is supposedly unique to the new HD's and 3500's. The 2500's (LD) I've seen didn't have them. In prior years, it was unique to only the diesels, any size. I'm not certain what year they started, though.
*************

My 95 Tahoe LD 6.5TD has the holes...

dsc