Re: 2005 Jeep Grand Cherokee 5.7 limited overheating when idle ?
First things I'd check is the waterpump weep hole to make sure it's still spinning properly at idle (controlled by the serpentine belt, which could be super loose). Then I'd check the specialized MOPAR power steering fluid (the fan is hydraulic on the HEMI) and make sure there's not a leak (fairly common). Then I'd go ahead and make sure you haven't blown your thermostat and it's stuck in the closed position. Not necessarily in that order though. Oh yeah, and check the coolant level/age.
'05 WK GC 5.7L HEMI, Goodyear Wrangler SilentArmors, Monroe Reflex Front Struts/Monroe Load Adjusting Rear Shocks, EBC Drilled/Slotted Sport Rotors, Wagner Ceramic Brake Pads, Taylor Shorties, SRT8 Stock CAI Conversion, K&N Drop-in, Block Heater, 18.5% Tint All Around, Boston SE Speakers, 12" Alpine Type-R Sub w/ sealed box w/ RF PRIME R1000-1D, ScanGauge II w/ windshield mount, BT Catch Can w/custom bracket, Swagman Fork Mount Bicycle Rack, WeatherTech front floor liners, SRT8 Pedal Covers, eBay full LED lighting kit, Custom MDS Indicator LED Light, Mega Raizin Voltage Stabilizer & Grounding Kit, Challenger IAT Sensor.