1974 GMC Suburban 1500 tire and wheel sizes, bolt pattern and tire pressure

Check the tables below for every tire size, wheel size, bolt pattern (PCD), rim offset and tire pressure fitted to the 1974 GMC Suburban 1500.

1974 GMC Suburban 1500 tire sizes

205/75R15 235/75R15

Bolt patterns

5x127

C/K series

6x139.7

C/K series

Other years

1973 1974 1975 1976 1977 1978 1979 1980 All 1973–2006

Fitment tables

6 trims sold in 1974

Open a trim for its factory package and every alternative size, front and rear.

GMC Suburban 1500 C/K series

1973 – 1991 USA market 6 trims

Suburban 1500 5.7

N/A · V8 205/75 R15 105S 1 fitment

GenerationC/K series 1973–1991

PowerN/A

EngineV8, Petrol

Center bore78.3 mm

PCD5x127

Thread1/2" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
205/75 R15 105S	15x6 ET25 ~~5x127~~	35	Tires Rims

Suburban 1500 5.7 4x4

N/A · V8 235/75 R15 112S 1 fitment

GenerationC/K series 1973–1991

PowerN/A

EngineV8, Petrol

Center bore108 mm

PCD6x139.7

Thread7/16" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/75 R15 112S	15x7 ET25 ~~6x139.7~~	35	Tires Rims

Suburban 1500 5.7D

N/A · V8 205/75 R15 105S 1 fitment

GenerationC/K series 1973–1991

PowerN/A

EngineV8, Diesel

Center bore78.3 mm

PCD5x127

Thread1/2" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
205/75 R15 105S	15x6 ET25 ~~5x127~~	35	Tires Rims

Suburban 1500 5.7D 4x4

N/A · V8 235/75 R15 112S 1 fitment

GenerationC/K series 1973–1991

PowerN/A

EngineV8, Diesel

Center bore108 mm

PCD6x139.7

Thread7/16" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/75 R15 112S	15x7 ET25 ~~6x139.7~~	35	Tires Rims

Suburban 1500 6.6

N/A · V8 205/75 R15 105S 1 fitment

GenerationC/K series 1973–1991

PowerN/A

EngineV8, Petrol

Center bore78.3 mm

PCD5x127

Thread1/2" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
205/75 R15 105S	15x6 ET25 ~~5x127~~	35	Tires Rims

Suburban 1500 6.6 4x4

N/A · V8 235/75 R15 112S 1 fitment

GenerationC/K series 1973–1991

PowerN/A

EngineV8, Petrol

Center bore108 mm

PCD6x139.7

Thread7/16" - 20 UNF

Tire size	Rim size and bolt pattern	Pressure, psi	Prices
235/75 R15 112S	15x7 ET25 ~~6x139.7~~	35	Tires Rims

Reading the table

What these columns mean

OE fitment: The package fitted at the factory for that trim.
Alternative: A size the car accepts without modification — plus-sizing, winter setups or optional wheels.
Rim size: Rim diameter × width in inches, and the factory offset (ET) in millimetres, e.g. 18x7.5 ET25.
Bolt pattern (PCD): Number of studs and the diameter of the circle they sit on. It must match exactly.
Center bore: Diameter of the hub hole. Larger aftermarket bores need hub-centric rings.
Pressure: Recommended cold inflation pressure for that axle, in psi.
Staggered: A wider tire on the rear axle than the front. Front-to-back rotation is not possible.
Thread size: Lug bolt or nut thread — needed when buying aftermarket fasteners.