Cadillac Escalade unable to exceed 80 mph after motor replacement at 143000 miles on Cadillac Escalade

Some Cadillac Escalade owners report experiencing a speed limitation of 80 mph following a motor replacement at 143,000 miles. This issue may be linked to a Service Suspension warning that arises after changing the rear suspension or replacing the suspension system air compressor. Additionally, the Speed Limit Assist feature could automatically restrict the vehicle's maximum speed based on identified posted speed limits. Owners have also noted acceleration problems that prevent maintaining speed within legal limits, which may indicate underlying performance issues. Furthermore, complications related to the transmission or the driver-selectable two-speed transfer case on 4WD models could contribute to this speed restriction. To address these concerns, it is advisable for owners to conduct a thorough diagnostic check and seek a professional inspection to identify the root cause of the limitation. If problems persist despite these efforts, exploring options like the lemon/buy back process may be warranted.