am i HEAVY duty ???

[g3ride69]

i have a 95 gmc k2500 suburban 4x4 7.4l 454 4l80E.

 

i checked the rpo's in the glove box...

 

and i have:

 

heavy duty front and rear springs

heavy duty suspension

heavy duty transfer case

heavy duty transmision cooling system

heavy duty alternater

the 10 inch rear diff

4.10 gears

 

what makes a truck "heavy duty" according to Chevy/GMC

 

when i look up parts at autozone my truck falls under light/standard duty NOT Heavy Duty.

 

any and all replys appreciated

 

[email protected]

[redvett]

Any truck with a GVW 8600 LBS or over is a heavy duty. Above 8600 has no gas mileage requirments. In your case its easy to check because 454 ci does not fall in the light duty class.

[o4yukonxl]

GM makes a truck model called HD or Heavy Duty. It's a 2500 or 3500 series truck. Your Suburban is a heavy duty (generic) vehicle. It's just not the GM Heavy Duty (HD) truck.

[PewterC3]

Any truck with a GVW 8600 LBS or over is a heavy duty. Above 8600 has no gas mileage requirments. In your case its easy to check because 454 ci does not fall in the light duty class.

that's interesting. I guess with a 8700lb rating my half ton C3 is considered "Heavy Duty"?

[redvett]

I dont know what C3 stands for but ay Chevy/GMC truck that has 6.0 L engine is HD or a gas guzzler and falls in the HD group.

[strosandjeeps2]

So my 2001 Suburban 2500 is really a 2500HD?

[robsawatsky]

So my 2001 Suburban 2500 is really a 2500HD?

No.

 

For many years, GM made 2500 pickups with either 7200 or 8600 lb GVWRs. They were referred to as "light duty" and "heavy duty" respectively. However, there is no exterior badging to differentiate. Depending upon the year, you could usually tell because the light had 6 lug nut hubs and the heavy had 8 lug nuts. The frame, suspension, brakes and other components were also heavier duty on the 8600 lb version.

 

Now - none of this has anything to do with the "2500HD" designation now found on GM pickups. The 2500HD's actually have similar GVWR to the old-body-style 1 ton models (3500's). GM just likes to confuse everybody. Initially, the new-body-style pickups also had "light duty" and "heavy duty" 2500s (not 2500HDs) in 99 and 00 only I believe with the heavy having the same old 8600 lb GVWR.

 

The Suburban 2500 has an 8600 lb GVWR, so it is like the old style "heavy duty" pickup designation but it is not a "2500HD".

 

As a matter of fact, for the body style prior to 2001 - the Suburban 1500 had a GVWR closer to the old pickup style "light duty" 2500 designation. The 2500 has only been 8600 lb GVWR for many years back.