Possibly a dumb question, but here goes. I'm installing a new (GM dealer) power assisted steering box in my '83 G20 6.2 diesel van, and wondered if I need to add gear lube to it, and if so, how and where? Also, can anyone recommend a good repair manual for chevy vans? I've decided to do most of my own work on this beast after being "stung" on a some recent repair jobs. The Haynes manual I now have is lame at best. Is the Chilton any better? Or should I bite the bullet and get the GM set? Any input would be appreciated. Currently replacing the heater core. Almost as much fun as a root canal!