2007 GMC Sierra 1500 Wheel Offset

ET31

Quick specs

OEM offset: ET31
Wheel size: 7.5x17 · 8x18 · 8.5x20
Backspacing: 4.97 in · 5.22 in · 5.47 in
Bolt pattern: 6×139.7
Center bore: 78.1 mm
Tire size: 245/70R17 · 265/70R17 · 265/65R18 · 275/55R20

OEM configurations

Configuration	Front	Rear	Offset	Backspacing	Tire	Bolt pattern	Center bore	Thread
4.3i · 4.3L, LU3, V6, Petrol	7.5x17	—	ET31	4.97 in	245/70R17	6x139.7	78.1 mm	M14 x 1.5
4.3i · 4.3L, LU3, V6, Petrol	7.5x17	—	ET31	4.97 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
4.3i · 4.3L, LU3, V6, Petrol	8x18	—	ET31	5.22 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
4.3i · 4.3L, LU3, V6, Petrol	8.5x20	10.5x20	ET31 / ET35	5.47 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
4.8i · 4.8L, LY2, V8, Petrol	7.5x17	—	ET31	4.97 in	245/70R17	6x139.7	78.1 mm	M14 x 1.5
4.8i · 4.8L, LY2, V8, Petrol	7.5x17	—	ET31	4.97 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
4.8i · 4.8L, LY2, V8, Petrol	8x18	—	ET31	5.22 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
4.8i · 4.8L, LY2, V8, Petrol	8.5x20	10.5x20	ET31 / ET35	5.47 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
5.3i · 5.3L, LY5/LH6, V8, Petrol	7.5x17	—	ET31	4.97 in	245/70R17	6x139.7	78.1 mm	M14 x 1.5
5.3i · 5.3L, LY5/LH6, V8, Petrol	7.5x17	—	ET31	4.97 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
5.3i · 5.3L, LY5/LH6, V8, Petrol	8x18	—	ET31	5.22 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
5.3i · 5.3L, LY5/LH6, V8, Petrol	8.5x20	10.5x20	ET31 / ET35	5.47 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
6.0i · 6.0L, LY6, V8, Petrol	7.5x17	—	ET31	4.97 in	245/70R17	6x139.7	78.1 mm	M14 x 1.5
6.0i · 6.0L, LY6, V8, Petrol	7.5x17	—	ET31	4.97 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
6.0i · 6.0L, LY6, V8, Petrol	8x18	—	ET31	5.22 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
6.0i · 6.0L, LY6, V8, Petrol	8.5x20	10.5x20	ET31 / ET35	5.47 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5
6.2i · 6.2L, L9H, V8, Flex-Fuel	7.5x17	—	ET31	4.97 in	245/70R17	6x139.7	78.1 mm	M14 x 1.5
6.2i · 6.2L, L9H, V8, Flex-Fuel	7.5x17	—	ET31	4.97 in	265/70R17	6x139.7	78.1 mm	M14 x 1.5
6.2i · 6.2L, L9H, V8, Flex-Fuel	8x18	—	ET31	5.22 in	265/65R18	6x139.7	78.1 mm	M14 x 1.5
6.2i · 6.2L, L9H, V8, Flex-Fuel	8.5x20	10.5x20	ET31 / ET35	5.47 in	275/55R20	6x139.7	78.1 mm	M14 x 1.5

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Compare your own setup

See how a different width or offset sits versus an OEM configuration for this year.

OEM baseline

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Wheels and hardware for this vehicle

Lug hardware

Wheel locks

Real-World 2007 GMC Sierra 1500 Wheel Setups

Observed aftermarket setups from documented Modified1 builds. These are individual build records — not OEM specifications and not clearance guarantees for every vehicle.

Common custom wheel sizes

Among builds in our database for this model year:

24-inch — 3 documented builds
20-inch — 2 documented builds

5 documented builds.

DiameterLayout

20×12 ET-44

Documented on a 2007 GMC Sierra 1500 build — observed custom fitment, not a universal fit guarantee.

Tires: 35/13.5R20

Suspension: Suspension Lift 8"

Compared with OEM

Compared with the 20×8.5 ET31 OEM configuration. Calculated geometry only — not fit confirmation.

Outer edge 119.4 mm farther toward fender (more outward poke)
Inner edge 30.6 mm farther from suspension (more inner clearance)
Width +3.5" vs OEM

View full build on Modified1

Staggered · 24×? / Rear unknown

Documented on a 2007 GMC Sierra 1500 build — observed custom fitment, not a universal fit guarantee.

Wheel: Boss 333

Front: 24×? · 275/30R24
Rear: —

Compared with OEM

Compared with the 20×8.5 ET31 OEM configuration. Calculated geometry only — not fit confirmation.

Diameter +4" vs OEM

View full build on Modified1

Staggered · 24×9 / 24×12

Documented on a 2007 GMC Sierra 1500 build — observed custom fitment, not a universal fit guarantee.

Front: 24×9 · 295/30R24
Rear: 24×12

Compared with OEM

Compared with the 20×8.5 ET31 OEM configuration. Calculated geometry only — not fit confirmation.

Diameter +4" vs OEM

View full build on Modified1

Staggered · 20×? / Rear unknown

Documented on a 2007 GMC Sierra 1500 build — observed custom fitment, not a universal fit guarantee.

Wheel: OEM GMC

Front: 20×? · 275/45R20
Rear: —

Compared with OEM

Compared with the 20×8.5 ET31 OEM configuration. Calculated geometry only — not fit confirmation.

View full build on Modified1

Staggered · 24×? / Rear unknown

Documented on a 2007 GMC Sierra 1500 build — observed custom fitment, not a universal fit guarantee.

Wheel: Boss 333

Front: 24×? · 275/30R24
Rear: —

Compared with OEM

Compared with the 20×8.5 ET31 OEM configuration. Calculated geometry only — not fit confirmation.

Diameter +4" vs OEM

View full build on Modified1

More specs for the 2007 GMC Sierra 1500

OEM offsets are catalog configurations, not an aftermarket “safe ET range.” Matching offset alone does not confirm clearance. Documented custom builds are observed setups only.