How to Get the Correct Front Hub Assembly for 2007 Chevy & GMC Trucks

Selecting the Right Part

When replacing the front hub assembly on 2007 Chevrolet Silverado and GMC Sierra trucks, it is crucial to identify the body style platform of the vehicle. GM made a mid-year model change in 2007 to its Silverado and Sierra 1500, 2500 and 3500 trucks. The manufacturer carried over the GMT 800 platform at the beginning of the 2007 model year and labeled it the Classic style. Then later in the model year, GM introduced the new GMT 900 platform and dubbed it the New style. However, no definitive date was given for when the switch from GMT 800 to GMT 900 was made.

Inspection Procedure

To ensure that you get the right part for your repair, it is necessary to carefully look at the vehicle and determine which body style the truck has – GMT 800 (Classic) or GMT 900 (New). Another option is to examine the front hub assembly that is on the vehicle – there are differences between the hub assembly for the GMT 800 and GMT 900. Using one of these methods ensures that you select the correct MOOG replacement hub assembly for your 2007 Silverado or Sierra.

Front End Design Differences

There are differences in the front headlamps that makes it easy to determine if the vehicle is a GMT 800 or a GMT 900.

GMT 800 (Classic) – Headlamp modules feature a split with a filler plate between the assemblies.

GMT 900 (New) – Headlamp assembly is a one-piece design.

Front Hub Assembly Design Differences

Examining the front hub assembly is the other method for determining which body style platform the vehicle is.

GMT 800 (Classic) – Features a passive ABS system and a thicker ABS cord (6mm)

GMT 900 (New) – Has an active ABS system and a thinner ABS cord (4.5mm)

MOOG Part Numbers

MOOG has front hub assemblies for both the GMT 800 (Classic) and GMT 900 (New) body designs.

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The content in this article is for informational purposes only. You should consult with a certified technician or mechanic if you have questions relating to any of the topics covered herein. Tenneco will not be liable for any loss or damage caused by your reliance on any content.