I had always thought the emmisions warranty was 80,000 miles no matter the brand.
I googled this question:
How long is the GM emissions warranty?
and got this response:
Warranty Coverage: Cars, Trucks, SUVs, Vans | Chevrolet
https://www.chevrolet.com/owners/warranty
From the first 2 years or 24,000 miles to 3 years or 36,000 miles, defects in material or workmanship continue to be covered under the New Vehicle Limited Warranty Bumper-to-Bumper coverage. Specified major components are covered for the first 8 years or 80,000 miles, whichever comes first, see dealer for details.
Now to see what the major components are.
View attachment 269695
Excerpted from: Warranty and Owner Assistance Information - Chevrolet
I googled this question:
How long is the GM emissions warranty?
and got this response:
Warranty Coverage: Cars, Trucks, SUVs, Vans | Chevrolet
https://www.chevrolet.com/owners/warranty
From the first 2 years or 24,000 miles to 3 years or 36,000 miles, defects in material or workmanship continue to be covered under the New Vehicle Limited Warranty Bumper-to-Bumper coverage. Specified major components are covered for the first 8 years or 80,000 miles, whichever comes first, see dealer for details.
Now to see what the major components are.

Excerpted from: Warranty and Owner Assistance Information - Chevrolet