chevy k20

pullinforfun · Feb 28, 2013

hi i was wondering if the newer wheels like off a 2006 duramax chevy would work on a 1985 K20? 3/4 ton 4x4. ? thanks

old · Feb 28, 2013

If both are the 8 hole I believe they should work just fine.

Keith-OR · Feb 28, 2013

now wait a minute, depends if 2006 is the light duty or heavy duty. Light duty is only 6 hole wheels and heavy duty is 8 hole. Also depends if 2006 is 2 wheel or 4 wheel drive
My 90 Chev 3/4 4X4 is classified as K2500, light duty w/6 hole wheels, And I have a 96 K2500 3/4 T 4X4 heavy duty w/8 hole.

johndeere720diesel · Mar 1, 2013

I think bolt pattern would be fine but you'd have a problem using the hub caps because of the 85 having lockouts would have to modify them

Jason the Red · Mar 1, 2013

I thought Chevy changed the lug pattern on their 8 lug wheels around 03, but I could be mistaken. A tape measure will tell you for sure!

chevytaHOE5674 · Mar 1, 2013

Bolt pattern is the same 8x6.5. Center hub hole should fit as the K20 shouldn't have the large lockouts like a dana 60 axle under a K30. Thing to be concerned about is the backspacing. A tape measure and a board across the face of the wheel will tell you quite a bit.

farmer boy · Mar 1, 2013

No 2500 made after 2000 ever had 6-lugs. Chevy changed their 8-bolt pattern for the 2011 model year. Went from 8x6.5" to 8x180mm. I thought the 6-bolt pattern also changed, but can't find that info now.

Keith-OR · Mar 1, 2013

Just like General Motors to mess up a good thing. I guess I better start keeping up with the new vehicles...Oh heck why? I don't plan on buying a new one anytime soon..

old · Mar 1, 2013

Ya sort of like what they did with the GMC and Chev 1/2 tons back in the early 70s. The Chev had 6 hole rims but the GMC had 5 hole rims. I had a 71 GMC and it had the 5 hole rims but all the 69 Chevs I had same body style had the 6 hole rims

Sean Feeney · Mar 1, 2013

2006 Chevrolet Silverado 2500
Bolt Pattern (in):
Bolt Pattern (mm):
Offset Range (mm):
Front Center Bore (mm):
Rear Center Bore (mm):
Stud_Size:
8x6.50
8x165.1
0 to 20
116.6
116.6
14x1.5

1985 Chevrolet C-20 2WD Pickup
Bolt Pattern (in):
Bolt Pattern (mm):
Offset Range (mm):
Front Center Bore (mm):
Rear Center Bore (mm):
Stud_Size:
8x6.50
8x165.1
-25 to 2
116.6
116.6
14x1.5
Double check

Tx Jim · Mar 1, 2013

My '08 1/2 4WD GMC has 6 lug 17" wheels

Rick Kr · Mar 1, 2013

Pullin,
Here is what you want to know.

1973-1987 C/K truck (or R/V)
8x6.5 inch (6.5 inch is 165.1mm)
9/16 studs

Now the 1 tons were actually built through 1990 model year with the C/K bodystyle.

1988-1998 GMT400
8x165.1mm
14mm studs
And yes GM did make a K2500 (aka 3/4 ton with 6 lug rims in a GMT400 style)

1999-2006 GMT800
8x165.1mm
14mm studs
For the 06 wheel it has a 117mm center, just a touch under 4 5/8 inch.
GM made a 1500HD in GMT800 style that had 8 lug rims. You could also buy a 2007 model year in the T800 style, it was called a "classic"

2007-13 GMT900
2007-2010 8 lug is 8x165.1mm
2011-up 8 lug is 8x180mm
14mm studs
2011 was a mid model change for increased GVW.

Biggest thing is you want to make sure you have the right taper/shoulder on the lug nuts.

Short answer is they should fit, depending on backspacing and hubcenter, but there are no guarantees. There were a few hub and other changes along the way that I cant remember.

Rick

Dalet · Mar 1, 2013

(quoted from post at 23:28:11 02/28/13) hi i was wondering if the newer wheels like off a 2006 duramax chevy would work on a 1985 K20? 3/4 ton 4x4. ? thanks

It is semantics, but a K-whatever is a GMC, not a Chebby. Just a half step better than the Chebby. 8)

Scott 730 · Mar 1, 2013

(quoted from post at 20:30:03 03/01/13)

(quoted from post at 23:28:11 02/28/13) hi i was wondering if the newer wheels like off a 2006 duramax chevy would work on a 1985 K20? 3/4 ton 4x4. ? thanks

Click to expand...

It is semantics, but a K-whatever is a GMC, not a Chebby. Just a half step better than the Chebby. )

Sorry dude but in that vintage truck a 3/4 ton 4wd Chev was a K20 and a GMC was a K25.

Dalet · Mar 1, 2013

(quoted from post at 20:48:17 03/01/13)

(quoted from post at 20:30:03 03/01/13)

(quoted from post at 23:28:11 02/28/13) hi i was wondering if the newer wheels like off a 2006 duramax chevy would work on a 1985 K20? 3/4 ton 4x4. ? thanks

Click to expand...

It is semantics, but a K-whatever is a GMC, not a Chebby. Just a half step better than the Chebby. )

Click to expand...

Sorry dude but in that vintage truck a 3/4 ton 4wd Chev was a K20 and a GMC was a K25.

Really? How come I have a C-20 and a K-20? 1982?

chevytaHOE5674 · Mar 1, 2013

K means 4x4 and C means 2wd nothing to do with Chevy or GMC.

Dalet · Mar 1, 2013

Thanks,
apparently in MN the titles are wrong. They are both 4x4.

Tx Jim · Mar 2, 2013

I second what chevytaHOE5674 stated. I own a '99 K1500 4WD Chevy & a '08 K1500 4WD GMC

chevy k20

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