2003 GMC Yukon XL - Page 9 - Answered Questions & Fixed issues


Hi there:
The DTC P0449 fault code is one of two things 90 percent of the time... either your gas cap is not sealing or your evap vent solenoid is not sealing either.


The code means you have a large evap leak. The evap solenoid is locate near or beside it and has a electrical connector that goes to it. It is either round or square



Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

2003 GMC Yukon... | Answered on Jul 05, 2012 | 771 views


I am interpeting this problem as a random drain on the battery judging by the parts you bought.

If you recently used your trailer hitch socket, the drain may originate there in the fixture. If not, you will need to use an Ohmmeter and disconnect both battery cables. With the exception of the memory in the onboard computer, all things turned off should stay off. Radio clock fuse may need to be removed.

This means that the Positive cable should not ground to anything when the key is off. With one end of the meter connected to the Red battery cable and the other end grounded to the frame, you can check for a stuck Relay by unplugging it and observing the effect on the Ohmmeter. Fuses would similarly be checked by removing or using another Ohmmeter on the tangs.

Systematically eliminate circuits until you find the grounded part.

You can get the wiring diagrams and fusebox layouts free at Autozone.com when you register your truck. Another site, Alldatadiy.com has wiring data too.

I hope my solution is helpful.

2003 GMC Yukon... | Answered on Jul 04, 2012 | 157 views


Had similar problem. Air temp.was 95 degress or more and I was running the ac setting still. Temp gauge went up to 240 or 250. I increased te rpms while sitting still and temp came down. Once I starting moving temp came down to normal operating limit.

2003 GMC Yukon... | Answered on Jul 02, 2012 | 188 views


need a tensioner tool, and pull back on tensioner to give room for new belt

2003 GMC Yukon... | Answered on Jul 01, 2012 | 308 views


First thing to check is if you have fuel pressure at the injectors and spark at the plugs.

2003 GMC Yukon... | Answered on Jun 24, 2012 | 229 views


Remove the tire. Remove the caliper and caliper bracket and hang aside. Remove the rotor. Remove the axle nut. Unplug the harness and remove it from the plastic holders. Turn the knuckle as necessary to remove the bolts securing the hub to the knuckle. Pushing on the axle outter joint will ease the process of removing the bolts. You may or may not have to hammer on the bearing to remove it from the knuckle. To install it reverse the procedure.

2003 GMC Yukon... | Answered on Jun 19, 2012 | 408 views


any codes?

2003 GMC Yukon... | Answered on Jun 15, 2012 | 90 views


bad inst. cluster

2003 GMC Yukon... | Answered on Jun 14, 2012 | 65 views


Buy the OE Flex Fuel Sensor on Ebay. There are people listing Original Equipment units by the same manufacturer who supplies GM. Their price is hundreds less than the dealer. Check it out. I bought one for my Chevy Sonoma. This part fits the 2003 Yukon too.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=160483318132

2003 GMC Yukon... | Answered on Aug 02, 2012 | 799 views


I don't think the orifice is the problem
& different refrigerant won't be either

You caused a change of state by spraying
the condenser. Tells you something, but not much

Have you put gauges on the system to check pressures?
Have you leak tested the system?

That is where you start

You have a leak that has to be repaired

2003 GMC Yukon... | Answered on Jun 12, 2012 | 156 views


Jesus, I had the same problem back in 2005 and there was a silent recall on the dash gauge wire harness. I took it back to the dealer i bought my 2003 Yukon from and they took care of it. Good luck!!

2003 GMC Yukon... | Answered on May 09, 2012 | 131 views


replace delay part, check relays first

2003 GMC Yukon... | Answered on Apr 27, 2012 | 140 views


ask around other owners but i think your switch is falty 9 years old not much of a job to fix 1 hour 2 if you know nothing about it

2003 GMC Yukon... | Answered on Apr 27, 2012 | 282 views


Wheels should roll, not grind. You have a Truck not a grinder. If anything is grinding it requires replacement or repair.

2003 GMC Yukon... | Answered on Apr 22, 2012 | 26 views


maybe you should see a doctor

2003 GMC Yukon... | Answered on Mar 20, 2012 | 75 views


remove the arm rest,ash-tray,and remove the inside lock handle and simply pull door pad.

2003 GMC Yukon... | Answered on Feb 29, 2012 | 278 views


If this is an intermittent problem,
remove the IPC 10A fuse in the fuse box under the hood,
not in the fuse panel by the driver side door,
for 5 minutes.
The electronics will reset.

2003 GMC Yukon... | Answered on Apr 10, 2017 | 5,908 views


GM Dexcool the red coolant.

2003 GMC Yukon... | Answered on Jan 14, 2012 | 46 views


Could you give me a little more information? What does the fuse run? Maybe look at the big red wire feeding the fuse block. If it is a little fuse maybe a bigger fuse is blown which feeds power to smaller fuse? If I knew what function you were looking at I could maybe find a wiring diagram to tell you where the power source comes from.

2003 GMC Yukon... | Answered on Jan 06, 2012 | 49 views

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