Under certain circumstances, it may become important to know if a dealer for one GM brand can provide under-warranty service for the vehicles from another of The General’s brands, or whether it’s necessary to find a same-brand dealer to complete repairs or service.
An example of such a situation might be if you bought a Cadillac from a dealer far from your home, but only Chevy and Buick dealers are present locally. Another circumstance where this question could be crucial is if your vehicle suddenly requires servicing while traveling, but you can only locate a different GM brand’s dealership nearby.
In fact, GM allows dealers from one brand to provide service for vehicles of another of its brands, provided the dealership owns the right equipment to carry out the repair successfully and properly. However, with that said, a dealer has the right to refuse to attempt a repair on a vehicle from a different brand.
A GM dealership is allowed to say “no” to a repair request for another brand and does not need to provide a reason for doing so. Simply not wanting to carry out the repair is a sufficient reason to refuse if the dealer decides to do so. A dealer is more likely to refuse, however, if they lack the correct tools, equipment, or know-how to perform that warranty service.
However, a Cadillac dealer may decide not to work on a Chevy Silverado HD or GMC Sierra HD, a GMC Hummer EV or a Chevy Corvette, all of which are sufficiently different from Cadillac models to make a successful repair difficult. A Buick dealer may not want or simply not be able to work on a Chevy Bolt EV, lacking expertise and equipment vital to repairing the subcompact electric vehicle.
Larger trends and outside factors could also increase or decrease the likelihood another GM brand’s dealership can offer service. For example, in July 2022, dealer repairs – including own-brand servicing – fell by 6 percent month-over-month and 9.8 percent year-over-year.
At that point in time, a shortage of both components – with supply chain disruptions continuing – and labor made it difficult for dealers to offer timely warranty service.
Some developments are conversely making certain repairs easier. A universal EV diagnostic standard may be rolled out by 2026, making cross-brand diagnostics of EVs much more feasible in the future.