03 Yukon XL dash and driver computer stopped working.

7 messages, Last post on Aug 02, 2009 at 8:17 PM

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What is this discussion about? GMC Yukon, GMC Yukon Denali, GMC Yukon XL, SUV

#5 of 7 Re: Erractic idle after battery discharged [fixitrod] by obyone Jun 10, 2009 (4:42 am)
Replying to: fixitrod (Jun 09, 2009 6:49 pm) Try unplugging the battery for 15 minutes or so. Resetting the MAF will usually get rid of idle issues.
#7 of 7 Air conditioning woes by fixitrod Aug 02, 2009 (8:17 pm)
My 2003 YXL has very wet carpet in the passenger side front and rear. Noticed in rear 1st and thought my son had wasted something but this was beyond his damage level. Checked the front and it was also wet but to a lesser degree. Haynes says drain plug may be culprit and it looked like it was positioned in the up direction but why now after 2 summers am I getting problem. Read about a rear drian plug as well; additional cause? Is it Coincedence that both are clogged up or is water draining front floor board to rear? Lots of rain in Metro Atl but Ac unit also not cooling to specs. Temp of compressor outlet colder not warmer tham evap inlet so I need to charge it up, check the rear blower drain (if thats what its' called) and dry the car and pad out. If the water returns where should I turn. Damaged evap? I hope I don't have to replace all this carpet and pad..... Oh, btw. My owners manual calls for AC Delco 41-974 spark plugs and in Haynes manual they spec the 03 as using 41-985. Is the heat range the same and are they interchangable. Denso makes the iridium and to anyones knowledge are the AC Delcos iridium and do they have the same heat range?