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2007 and newer Chevrolet Tahoe and GMC Yukon

3125 messages,  Last post on Nov 27, 2009 at 6:32 PM

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#2154 of 3125 Re: recall for reprogram [ltzin] by tuscotodd Jan 05, 2007 (8:47 pm)
Replying to: ltzin (Jan 05, 2007 7:36 pm) I have the Zoomer's cat back on mine - haven't done the air box, but the cat back woke it up in short order! Notable change in how much time it spends in V-4. I haven't had a chance to stop by the dealer and check into the reprogram yet - but I am hoping that makes a notable difference as well. I have a little over 15k on mine and the best I have manage milage wise was driving 65-68mph with no headwind and non-ethanol added gas. I got 22.1mpg (calculated) on the 420 mile trip. Conversly, over Christmas I went one a similar trip with a 20mph headwind for part of the trip driving 77mph with 10% ethanol added gas and averaged 16.7 for the 370 trip. Hope that helps!
#2156 of 3125 2007 Yukon Wind Shield Wipers by yukoner77 Jan 09, 2007 (12:01 pm)
Does anyone's wind shield wipers come on by themselves mid-driving? Mine just come on and the only way they go off is if I turn the car off and it keeps spraying and wiping, spraying and wiping! Replies to this message: 73shark (Jan 09, 2007 7:24 pm) ltzin (Jan 09, 2007 8:05 pm) jjmjgnx (Jan 11, 2007 8:34 am) ltzin (Jan 11, 2007 8:07 pm) socaltahoe (Jan 15, 2007 12:10 pm)
#2157 of 3125 Upgraded Exhaust on 2007 Denali? by dlmart2 Jan 09, 2007 (4:02 pm)
I know this may be a neewb question but here goes. I was at the store today and a gentleman saw me getting out the Denali (2007) and asked if I had my exhaust system installed after market. I said no. He said that's a high performance exhaust. I said "really"? I mentioned to him that I thought it was kinda loud in my opinion. He said its supposed to be, but you get better performace. Anyone have any info on this? Replies to this message: 4speed1 (Jan 09, 2007 5:09 pm) 73shark (Jan 09, 2007 7:27 pm) jerrywimer (Jan 10, 2007 4:29 am) dlmart2 (Jan 10, 2007 4:56 am)
#2158 of 3125 Re: Upgraded Exhaust on 2007 Denali? [dlmart2] by 4speed1 Jan 09, 2007 (5:09 pm)
Replying to: dlmart2 (Jan 09, 2007 4:02 pm) I got an 07 Tahoe now, but used to have an 99 Tahoe with flowmasters and K&N intake.   The flowmaster were loud and my ears would ring after long drives.   I bought it like that and quickly got sick of the loud exhaust. I don't know why guys like loud pipes, but it got old.   Also I removed the K&N intake and put the stock back on--no noticable difference in proformance or MPG's.   there are quieter flowmasters than I had, but if they really work (more Hp & MPG), then why doesn't GM put them on if it's such "easy" bolt-on power?   Save your dough in my opinion
#2159 of 3125 Re: 2007 Yukon Wind Shield Wipers [yukoner77] by 73shark Jan 09, 2007 (7:24 pm)
Replying to: yukoner77 (Jan 09, 2007 12:01 pm) Sounds like your RainSense and Heated Washer Fluid systems are ganging up on you. Seriously tho, you probably need to take it in to your Service Dept.
#2160 of 3125 Re: Upgraded Exhaust on 2007 Denali? [dlmart2] by 73shark Jan 09, 2007 (7:27 pm)
Replying to: dlmart2 (Jan 09, 2007 4:02 pm) GM offers both a performance and a touring cat-back exhaust system. Did you buy yours new?
#2161 of 3125 Re: 2007 Yukon Wind Shield Wipers [yukoner77] by ltzin Jan 09, 2007 (8:05 pm)
Replying to: yukoner77 (Jan 09, 2007 12:01 pm) I had that happen to me also around Oct. I was at the service dept for something else and a guy that also was there with his wifes LTZ had asked me if this had happened to me because it also happened to him. Service Dept told me they could'nt find any defect. Then today it happened to my wife. I am bringing in the truck on Thurs for numerous things like the batt. keeps dying, the ecm reprogram that is required #06162 the rear door window moulding keeps coming out. Power stering makes realy loud sound when truck is cold. I'm sure they will say nothing is wrong. Replies to this message: jjmjgnx (Jan 11, 2007 8:34 am) ltzin (Jan 11, 2007 8:07 pm) socaltahoe (Jan 15, 2007 12:10 pm)
#2162 of 3125 Re: Upgraded Exhaust on 2007 Denali? [dlmart2] by jerrywimer Jan 10, 2007 (4:29 am)
Replying to: dlmart2 (Jan 09, 2007 4:02 pm) Since you have the Denali, you also have the 6.2l V8, right? It might come stock with a "high performance" exhaust unlike the 5.3l non-Denali vehicles. The 6.0l Avalanches come with a different standard exhaust too, though it appears to at least be an aluminized system (like the stock 5.3l system). The GM Accessories cat-back systems are both all stainless steel.   I bought the GM touring cat-back exhaust with my Avalanche. Because it took a couple of weeks after the Av came in for the exhaust to come in I was able to compare the stock and new system. Stock was much quieter under any sort of engine load, where the touring system is especially loud when the Av's cold or I'm into the throttle heavy. At normal cruising speeds it is actually mellow but noticable. The GM accessories site indicates that the performance version would be even louder.   So if you do have the stock engine it's probably as quiet as it's going to get without a bit of aftermarket digging around. I can pretty much guarantee that any non-original part number GM accessories system will be even louder. Replies to this message: dlmart2 (Jan 10, 2007 4:56 am)
#2163 of 3125 Re: Upgraded Exhaust on 2007 Denali? [jerrywimer] by dlmart2 Jan 10, 2007 (4:56 am)
Replying to: jerrywimer (Jan 10, 2007 4:29 am) Yes I have the Denali with the 6.2l. Thanks for your response! Makes sense.

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