Join Date: Oct 2009
Location: Southwest Center City Philly
Re: Colorado won't start
i also had this problem, but (at least for now) i was able to fix it. 05 cc ls z71 4x4 ~117k mi
in grocery store parking lot, truck wouldn't even try to turn over despite having all electronic systems go (hvac blower, lights, etc). displayed "reduced power." messed with battery leads, still wouldn't start. waited ~5 minutes, tried again, magically starts up, reduced power goes away but check engine light comes on.
short drive back to work where fortunately (being far from home) i have access to tools. removed nasty looking battery clamps from nasty looking terminals and with stiff wire brush filed away the large amount of rust and small amount of corrosion on clamps, nuts, terminals, etc as best i could. the negative clamp was so worn a g.d. metal chunk fell off! thoroughly blew off rust and corrosion dust and reconnected cables, although the metal piece that fell off resulted in the negative clamp being loose on the terminal... needs replacing of course. anyway, truck starts up fine and check engine light is gone!
in summary, check your battery terminals and cable clamps to make sure they're tight and not overly rusted/corroded. i suspect a dying battery could cause similar symptoms too though...
2005 Chevy Colorado LS CC Z71 4x4 3.5L I5