FIRE HAZARD ADD TO 10202950 WINNEBAGO JOURNEY D L,:, MODEL # 2002 WKP36GD, WITH UNDER 50,000 MILES. CLIMBING THE 21 MILE GRADE WAS NO PROBLEM FOR THIS 330 CAT DIESEL, AT LESS THAN 40 MILES PER HOUR I NOTICED THAT THE LEFT REAR BEDROOM SLIDE WAS OUT 4 INCHES. I FOUND A SAFE PLACE TO PULL OF THE ROAD. THE TURBO CHARGER HAD BEEN WORKING PRETTY HARD COMING UP THE HILL SO AFTER SETTING THE PARK BRAKE I LET THE ENGINE IDLE WHILE I WENT TO THE REAR OF THE COACH TO RETRACT THE SLIDE, FORTUNATELY MY WIFE REMAINED IN FRONT. THE BEDROOM HAS NO WINDOW ON THE LEFT SO I SAW NOTHING UNUSUAL WHEN I PUSHED THE RETRACT SWITCH EXCEPT THE SLIDE DID NOT MOVE. MY WIFE INSTANTLY HOLLERED THAT SMOKE WAS COMING OUT FROM THE REAR LEFT SIDE. I RAN TO THE FRONT, TURNED OFF THE ENGINE, GRABBED THE FIRE EXTINGUISHER AND WE BOTH EXITED IN A HURRY. BY THE TIME I GOT TO THE REAR OF THE COACH GREY SMOKE WAS COMING OUT THE BACK PRETTY HEAVY. A TRUCK DRIVER HAD ALREADY STOPPED ACROSS THE ROAD FROM ME. HE RAN BACK TO HIS TRUCK AND CAME BACK WITH A LARGE, 30 OR 50 POUND EXTINGUISHER. MEANWHILE THINGS ARE HAPPENING FAST. A LOUD POP CAME FROM THE ENGINE COMPARTMENT FOLLOWED BY THE SOUND OF A LOT OF AIR BEING RELEASED. THE FIRE ACCELERATED QUICKLY AND TURNED BLACK WITH SOME YELLOWISH BROWN SWIRLS. ANOTHER LOUD POP CAME FROM THE ENGINE COMPARTMENT FOLLOWED BY A COUPLE OF QUARTS OF A BROWNISH CLEAR, OILY LIQUID DUMPED ON THE GROUND UNDER THE ENGINE COMPARTMENT. ANOTHER LOUD WOOSH WAS HERD, THE SMOKE GOT LIGHTER IN