LP17
March 20th, 2025, 05:42 AM
Other day got in my duramax and low engine power flashed on the milage screen and it would only go up to 1500rpms, so I figure its in limp mode. No check engine light or codes show up anywhere and even had a gm dealer plug into it and they also cannot pull any codes. Replaced the MAF and filter with no change. Any ideas what this could be? PPEI said to try reflashing the tune to the ecm...but I'm not sold on that fixing the issue. Wondering if the best bet is to try to flash the factory tune back and see if the ppei tune is hiding any codes.