General Motors launched the GMC Sierra AT4 with the debut of the light-duty pickup’s fourth generation for the 2019 model year. The Sierra range, including the AT4, was later refreshed for the 2022.5 ...
The refreshed 2022 GMC Sierra 1500 is now eligible for dealer retrofits of the missing Front and Rear Park Assist feature (RPO code UD5) or missing Rear Park Assist feature (RPO code UD7), thanks to ...
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