Reviewed By DAN T (Houston, TX) Reviewed for a 1998 GMC Yukon —12/4/2006 12:25 PM
Ordered this particular brand after reading complaints of others not having large enough tire size speedo corrections. My tires are 35" but Jet caple of 44" (I think) in 1/2" steps. OBDII reader funtion did show error code (transient problem) & reset (extinquish) 'service engine soon' light. Performance increase most notably from tranny shift points (speed & RPM) & firmness. Remebers stock settings of 1 vehicle only, so don't plan on using on multiple cars. I will reset to stock for next emissions check.