Took all botls off oil pan will not come off. but i see 3 bolts on front and rear do they have to come off tow.

You are most likely going to have do as Ray said and pull engine up with cherry picker or GOOD JACK to back the tranny off the rear main seal. Keep in mind that The oil pan has a front and rear main seal that may need to be replaced when you do this. Not a quick job. Get a Chilton book and read the section regarding oil pan gaskets and seals. Hope this helps

the 2.2 engine and the 4.3 engine with 2WD MODEL you have to remove engine.the 4WD MODELS, you have to remove all these parts first remove dip stick, drive belt, splash shield, remove front axle shield and the transfer case shield, front skid plate and the flywheel cover,remove left and right engine mount through bolts.then raise the engine using a lifting device, and block in position,using large wooden blocks between the motor mounts and brackets.you will also need to remove these parts,remove disconnect oil cooler line, remove pitman aem bolt and pitman arm, remove idler arm bolts and idler arm, remove front differential through bolts,remove front driveshaft if necessary,remove differential assembly by rolling it forward for clearance, remove starter motor, then remove oil pan bolts then remove oil pan, your oil pan need to be flushed slightly forward of rear of the block to allow proper alignment with the transmission housing.using feeler gauge measure the 3 oil pan to transmission contact points.clearance should not exceed 0.011 in. 0.3mm if so realign the oil pan.oil pan bolts torque is 18 ft lbs tighten oil pan bolts in sequence.

you have a lion by the tail but i will tell you how.

1 drain your oil completely

2 un bolt the oil pan there are a lot of small bolts in the oil pan

3 un bolt the rear main barring that is the one next to the transmission
when you get the barring down don't touch the barring with your hands
now look Ware you took the barring down from you will see the
rear main seal remove the old and install the new once that is done
you need to put the barring back in with the bolts snug them up now
you need a torque wrench the bolts need to be torqued down to
30 ft.lbs each make sure the motor is clean from the old gaskets
and the oil pan use (permatex)(black) on both sides of the gaskets
4 reinstall the oil pan fill with oil and start your engine let it run for 10
min and let the gasket setup

hope this helps you
bob

It has to be on the bottom of the oil pan. It is usually in the center of the engine on the bottom. Check right in the middle of your front grill. Jack it up and look toward the back and you should see it. It has a bolt that twist off. It would be the only holding compartment with a botl on the side.

4WD To Remove:

1. Remove or disconnect the following:
   • Negative battery cable
   • Oil level indicator
   • Front differential assembly
   • Starter
   • Transmission cover
   • Oil pan drain plug and drain the engine oil into a suitable container
   • Remote oil filter pipe adapter
   • Remote oil filter hose clip bolt on oil pan
   • Starter wire harness bracket stud
   • Transmission oil cooler pipes (if equipped)
   • Access plugs for oil pan rear nuts
   • Transmission to oil pan bolts
   • Oil pan nuts and bolts
     
     NOTE: The low oil level sensor is not reusable.
     
   • Remove and discard the engine oil level sensor (if applicable)
     
     
   • The oil pan
   • The oil pan gasket
2. Discard the oil pan gasket.
3. Clean all sealing surfaces on the engine and the oil pan.

To Install:
Note: Whenever the transmission and the engine oil pan are removed from the engine at the same time install the transmission before the oil pan. This is to allow for the proper oil pan alignment. Failure to achieve the correct oil pan alignment can result in transmission failure.

1. Apply a 0.197 inch (5 mm) wide and 1.0 inch (25 mm) long bead of adhesive GM P/N 12346141 (Canadian P/N 10953433) or equivalent to both the right and left sides of the engine front cover to engine block junction at the oil pan sealing surfaces.
   
   
   
   
2. Apply a 0.197 inch (5 mm) wide and 1.0 inch (25 mm) long bead of adhesive GM P/N 12346141 (Canadian P/N 10953433) or equivalent to both the right and left sides of the crankshaft rear oil seal housing to engine block junction at the oil pan sealing surfaces. Note: Always install a new oil pan gasket. The oil pan gasket and oil pan must be installed and the fasteners tightened while the adhesive is still wet to the touch.
   
3. Install the new oil pan gasket into the groove in the oil pan. Note: The oil pan alignment must always be flush or forward no more than 0.011 inch (0.3mm) from the rear face of the engine block.
   
4. Install or connect the following:
   • The oil pan onto the engine block
     1. Press the oil pan gasket into the grooves of the engine front cover and crankshaft rear oil seal housing
     2. Slide the oil pan back against a suitable straight edge
   • The oil pan bolts and nuts, but do not tighten
5. Measure the pan-to-transmission housing clearance using a feeler gage and a straight edge.
   
   
   • Use a feeler gage to check the clearance between the oil pan-to-transmission housing measurement points
     1. If the clearance exceeds 0.011 inch 0.3mm) at any of the 3 oil pan-to-transmission housing measurement points (A), then repeat the step until the oil pan-to-transmission housing clearance is within the specification
     2. The oil pan must always be forward of the rear face of the engine block
   
   
   
6. Tighten the oil pan bolts and nuts in sequence
   • Torque to: 18 ft lb (25 Nm).
7. Measure the clearance between the 3 oil pan-to-transmission housing measurement points in order to ensure proper alignment.
8. Install or connect the following:
   • A new oil pan drain plug seal (O-ring) onto the oil pan drain plug
   • Oil pan drain plug into the oil pan
     1. Torque to: 18 ft lb (25 Nm)
     NOTE: The low oil level sensor is not reusable.
     
     
     
   • New low oil level sensor
     1. Torque to: 115 in lb (13 Nm)
   • Transmission to oil pan bolts.
     1. Torque to: 35 ft lb (47 Nm)
   • Access plugs for the oil pan rear nuts
   • Starter wire harness bracket stud
   • Transmission oil cooler pipes (if equipped)
   • Remote oil filter pipe adapter
   • Oil filter hose clip bolt to the oil pan
   • Transmission cover and bolts.
   • Starter motor
   • Front differential assembly
   • Oil level indicator
9. Fill the engine with oil.
10. Connect the negative battery cable.

YOU HAVE TO SUPPORT ENGINE WITH A ENGINE SUPPORT BRIDGETOOL 10-222A AND ENGINE SLING TOOL 2024A FROM THE TOP.BECAUSE YOU HAVE TO LOOSEN SUBFRAME MOUNTING BOLTS.SUPPORT THE SUBFRAME.REMOVE OR DISCONNECT THE FOLLOWING FRONT BOLTS NUMBER 2 AND 3.BOLT NUMBER 1 BOLT FROM THE SUBFRAME.SLOWLY LOWER THE FRAME.FOR MANUAL TRANSMISSION LOOSEN THE LEFT TRANSAXLE MOUNT NUT UNTIL IT IS ALIGNED WITH THE LOWER EDGE OF THE BOLT APPROX 4 TURNS.IF EQUIPPED WITH AUTOMATIC TRANSMISSION LOOSEN THE REAR BOLT FOR THE LEFT TRANSAXLE MOUNT SEVERAL TURNS THEN REMOVE THE FRONT BOLT FOR THE TRANSAXLE MOUNT.AT THE RIGHT TRANSAXLE MOUNT LOOSEN THE REAR BOLT MOUNT SEVERAL TURNS AND REMOVE THE FRONT BOLT.IF EQUIPPED WITH A MANUAL TRANSAXLE BOTH REAR BOLTS ON THE OIL PAN CAN BE ACESSED THROUGH THE OPENING ON THE FLYWHEEL TURN FLYWHEEL AS NEEDED.THEN REMOVE OIL PAN.

there should be 2 x pins,both in bottom of block,one front/one rear but pan is glued on.....as well as bolted.pull harder....

Fluid - A/T: Service and Repair
Transmission Fluid and Oil Filter Changing
REMOVAL PROCEDURE
1. Raise and suitably support the vehicle. Refer to Vehicle Lift Points.
2. Place drain pan under pan
3. Remove oil pan bolts from front and sides only.
4. Loosen the rear oil pan bolts approximately four turns.
5. Lightly tap the oil pan with a rubber mallet or pry to drain the fluid from main case.
6. Remove the oil pan bolts from rear oil pan and gasket.
7. Remove front oil pan bolts leaving one corner bolt in loosely.
8. Lightly tap oil pan with rubber mallet or pry to drain fluid.
9. Remove the following remaining components:
^ The front oil pan bolts
^ The oil pan
^ The gasket
10. Remove the oil filter bolts and filter.
11. Clean the following components:
^ The transmission case
^ The front adapter case
^ The oil pan gasket surfaces with solvent
^ Air dry
^ All traces of gasket material must be removed
INSTALLATION PROCEDURE
1. Install the gasket.
2. Install the oil filter.
3. Install the bolts.
^ Tighten the transmission oil filter bolts to 20 Nm (15 ft. lbs.).
NOTICE: Refer to Fastener Notice in Service Precautions.
4. Install the front oil pan.
5. Install the front oil pan gasket
6. Install the front oil pan bolts
^ Tighten the front oil pan bolts to 11 Nm (96 inch lbs.).
7. Install the following components:
^ Install the pan
^ Install the gasket
^ Install the bolts
^ Tighten the oil pan bolts to 11 Nm (96 inch lbs.).
8. Refill the transmission with DEXRON III through oil pan fill plug on the side of the (main case) oil pan. Fill the transmission to lower edge of oil
pan fill. Fill plug opening using and oil suction gun.
^ Tighten the oil pan fill plug to 45 Nm (33 ft. lbs.).
9. Lower the vehicle.
10. Check the transmission fluid level. Refer to Transmission Fluid Checking Procedure.

If this is a 4WD it is easiest to remove the front differential an the pan will drop right down.

I noticed the same thing on mine......If you look, it seems that its all one pan...

When i changed my oil i just took out the rear bolt...i didnt mess with the one in the front.