i have an 89 gmc r3500 that i believe has around 300000 miles but not sure because of the odometer only shows 5 digits.ive had it about 6 years now havent put alot of miles on it.should i change filter and fluid or leave it?ive read if it hasnt been change in a while and you change it it will...
i have a 1989 gmc r3500 with a 454 that when its below 1000 rpms the power steering doesn't work but as soon as you rev it it works.its hydro boost if that helps any.the pump also runs the brakes and as far as i can tell they work fine.should i replace the pump or hydraulic brake booster or look...