1994 Buick Roadmaster Owner's Manual - Page 188

I NOTICE: Adjusting an equalizing hitch with the Electronic LevelControl (ELC) system engaged will defeat thefunction of the load equalizing hitch and may cause unsatisfactory handling. 1 NOTICE: Do not use swaycontrol devices on trailers equipped with surge brakes,Le, boat trailers. Surge brakes not function properly when do used with most sway control devices. Once you have completed towing your trailer, be sure to ;reinstall the Electronic Control (ELC) fuse. Trailer brakes of adequate size are recommended on trailers over 1,000 lbs. loaded weight. i In Addition Use two friction sway controls YOU trailer is over if 5,000 lbs. (2 270 kg) loaded weight, and/or is over 24' long. j If a trailer is over5,000 lbs. (2 270 kg), adjust 35 vehicle rear tire pressure to psi. (cold tire pressure). Use at least one friction sway controlif your trailer is over 2,000 lbs. (908 kg) loaded weight, and 2,000 lbs. consider usingone for trailers under (908 kg).