Reduced engine power/Traction control light on
You will need to have the codes pulled to find out what is going on, write them down and post them back here, some will jump in and help,you along with further diagnosis.
good luck - ain't going to work more than a few months - I have been fighting this issue with dealership for last 3yrs. they fixed it once under the warranted by the Gov't "Emmission Control" (under 130,000K or 8yrs) but it still does the same thing 21Aug2017. My new codes read from P2138, P1125,P2120 - so might just try to replace the gas pedal itself - but I know that this issue is a factory/design atrocious error . I have come to the decision that I am no longer entertaining the thought of purchasing a Canadian or American Vehicle - they don't deserve customer loyalty or my money (mind you why should they - gov't payoff works well for them).
Search Buick LaCrosse Questions
Buick LaCrosse Experts
Related Models For Sale
Used Cars For Sale