Compatible engines?

As of my last update in September 2021, the 2008 GMC Envoy with a 4.2L in-line 6 cylinder engine came equipped with a specific engine, and you typically cannot swap it with any other engine without significant modifications.

For this specific model and year, the engine options were limited to the 4.2-liter inline-6 engine. The GMC Envoy's 4.2L engine was designed and manufactured for this particular model and may not be directly compatible with other engines without extensive modifications and potentially voiding warranties or violating emissions regulations.

If you are experiencing issues with your current engine or looking for replacement parts, it is recommended to consult with a certified GMC mechanic or dealership for appropriate options and compatibility.

Keep in mind that automotive information may change over time, and there might have been updates or modifications beyond my last knowledge update. For the most current and accurate information, it is best to refer to the GMC website, consult with a dealership, or use up-to-date automotive databases and resources.