What's the 7e8 engine code Chevy Tahoe?

The 7E8 is considered a general error code. Any vehicle can emit these if its having trouble with the emissions system. 7E8 is not specific to the Tahoe. Using a multi-purpose OBD scanner at home, finding this error can indicate an issue with the emissions system. Issues to consider are a bad MAF (Mass Air Flow) sensor; a damaged oil pan; upstream exhaust leaks near the vehicle's O2 sensors and/or exhaust leaks downstream near the MAF sensor. Repair costs associated with replacing a bad MAF sensor, average $230-280 in parts and labor, while a damaged oil pan can run anywhere from $570-630 in parts and labor. To properly diagnose the 7E8 code, visit a reliable service center.