TSBs

Replacing Chevy generator

April 1, 2024

This bulletin applies to 2018-2023 Chevy Express and GMC Savana vehicles equipped with a 4.3L LV1 or 6.6L L8T engine.

Motor Age Staff

Related To: Mitchell 1

Remove the air inlet grille panels and the windshield wiper system module (1).

Note the location of the inner lower right side seam circled.

This bulletin applies to 2018-2023 Chevy Express and GMC Savana vehicles equipped with a 4.3L LV1 or 6.6L L8T engine.

Conditions may include or more of the following:

- Engine will not start

- Hard to start, with squeal noise

- Fan belt broken

- Loss of power steering

- Loss of power brake assist

Apply the High-Tech Clear Seam Sealer P/N P10200 to the seam. Be sure to apply the sealer to the entire inner lower right side seam.

The cause of the condition may be water leaking from the cowl area into the generator vents. Under certain weather conditions, the water can freeze inside and prevent the generator from turning.

Replace the generator, belt and any other pulleys that have been contaminated with rubber buildup from the belt heating up.

Seal the water leak at the cowl with Kent Automotive High-Tech Clear Seam Sealer to the area shown in one of the following images.

About the Author

Motor Age Staff

Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored.