I need to know the timing marks for installing the timing chain and in 1992 GMC sonoma st in the firing order on the distributor and the engine block.

If timing marks are on , distributor is out . Bring #1 cylinder up on top dead center on compression stroke an see if rotor is pointing at # 1 on distributor cap . Do you know what the firing order is on the distributor cap ?

timing chain check....place cylinder 1 at end of compression then the timing mark place at 0 distributor rotor should be to number 1 cylinder. if not timing chain could be out of teeth
3 major things for engine is air,fire,fuel.then you say you change the distributor ....is it in good position???

Got kind of confused because I'm pretty sure the Sonoma didn't come out until 1992 but then again I could be wrong. Not perfect you know. Anyhow this is the firing order for the GMC 2.8 Liter engines from 90 - 93 (see picture below). I hope this is what your looking for and I hope it helps. good luck.

You did not list the engine, but this should help:

Distributor rotates clockwise on all engines.

2.5L --1-3-4-2

2.8L --1-2-3-4-5-6

4.3L --1-6-5-4-3-2

I do not have a breakdown diagram for a distributor, but just the firing orders and description of ignition system for the Dodge Colt and related models (based on Chilton manuals) if that's what you're looking for: FIRING ORDERS Fig. 1: 1990 1.8L SOHC Engines Firing order: 1-3-4-2 Rotation: clockwise

Fig. 2: 1.6L DOHC Engine Firing order: 1-3-4-2 Distributorless Ignition

Fig. 3: 2.0L Engine Firing order: 1-3-4-2 Rotation: clockwise

Fig. 4: 1.5L Engine Firing order: 1-3-4-2 Rotation: counterclockwise

Fig. 5: 1993 1.8L Engine Firing order: 1-3-4-2 Rotation: counterclockwise

Fig. 6: 2.4L Engine Firing order: 1-3-4-2 Rotation: clockwise

To avoid confusion, replace spark plug wires one at a time. --- Distributor REMOVAL & INSTALLATION Although the distributor can be removed from the engine no matter which cylinder is about to fire, it is a good idea to have number one cylinder at TDC before distributor removal. 1.5L, 1.8L, 2.4L SOHC Engines

1. Disconnect the negative battery cable.
2. Disconnect and tag the spark plug wires from the distributor cap.
3. Disconnect the distributor harness connector.
   Fig. 1: Ignition system for the 2.0L engine
   
   Fig. 2: Ignition system for the 1.5L engine
   
   Fig. 3: Ignition system for the 1992-93 1.8L engine
   
   Fig. 4: Ignition system for the 2.4L engine
   
   
4. Loosen the distributor retaining bolt and remove the distributor from the engine. To install:
   
5. Rotate the engine until No. 1 cylinder is at TDC on its compression stroke. NOTE: Be careful not to turn it to the No. 4 cylinder TDC on its compression stroke by mistake.
   
6. Align the distributor housing and gear mating marks.
   Fig. 5: Ignition system for the 1990 1.8L engine
   
   Fig. 6: Distributor installation for the 1990 1.8L engine
   
   Fig. 7: Distributor installation for the 1992-93 1.8L engine
   
   
7. Install the distributor into the engine, while aligning the fine cut (groove or projection) on the distributor flange with the center of the distributor mounting stud.
8. Install and tighten the distributor retaining bolt.
9. Reconnect the distributor harness connector.
   Fig. 8: Distributor installation for the 2.4L engine
   
   Fig. 9: Distributor installation for the 1.5L engine
   
   Fig. 10: Distributor installation for the 2.0L engine
   
   
10. Install the distributor cap and spark plug wires.
11. Reconnect the negative battery cable.

Here is the firing order diagrams for the 4.3 liter V-6 engine and the 2.2 liter 4 cylinder engine, and let me know if you need any help to understand these diagrams, or if you require any further assistance.

4.3 Liter V-6 Engine.



2.2 Liter 4 cylinder engine.

For GMC 350 the firing order is 1-8-4-3-6-5-7-2.

The distributor rotor turns clockwise when viewed from above, so the spark plug wires would be installed in the same order as the firing order, beginning with #1.

To find which contact in side the distributor cap that the rotor is "pointing" to, use a ratchet on the center bolt of the crankshaft and turn the engine over by hand (clockwise direction only as viewed from the front of the engine looking towards the firewall) until the timing mark on the harmonic balancer aligns with the "0" mark on the timing cover (may also be indicated by a deep "V" cut into the timing mark indicator attached to the timing cover).

Normally, the rotor will either be "pointing" towards the firewall with a bit more emphasis towards the driver's side cylinder bank, or it will be pointing towards the front of the passenger side front fender. If it is pointing towards the fender, turn the engine over again until the timing marks align and the rotor should be pointing towards the firewall as described above.

Find the closest terminal in the distributor cap that matches the rotor's alignment and install the #1 wire. The distributor cap and then be installed with the remaining wires installed around it clockwise from #1 using the firing order.

Some turning of the distributor may be necessary to get the engine statred. Once it does start, use a timing light to set the timing.

Hope helps (remember rated this).

Question 4.3 Litre V6 or 2.2 Litre inline 4 cyl.

Procedure as follows: in either case remove # 1 cyl spark plug and rotate engine until # 1 piston is at top dead center , with a suitable marking pen make a reference mark on crankshaft harmonic balancer and timing mark indicator on engine timing cover. Make a notation on the distributor cap of the number one spark plug wire and also note the remaining wires firing order sequence on cap in order of rotation. Remove cap and note and mark rotor location , make a reference point on distributor body as well as engine block . Remove cap and wires , loosen distributor lock down bolt , disconnect distributor wire harness and label harness for reference to reconnect upon re-installation. Twist as you pull up on distributor , distributor should come out freely with minimal effort but occasionally they can be a little tough and need to be helped out with minimal extra persuasion...

If you find that upon re-install you get a trouble code P1345 don't threat just start over the process of placing # 1 cyl at TDC and then reference the marks you made during dismantle, There is a + - 3 degrees tolerance that the computer can adapt... But you will have to erase any trouble codes... You should not have to remove the hood, maybe just the air box and or filter housing for easier access.... Unless you are removing entire engine then yes remove hood by all means, mark hood hinges and mounting holes before removing for easier alignment during install of hood... Hope this helps...

go to the link for your info.

http://autorepair.about.com/library/firing_orders/bl-fo-9292.htm

1995 GMC Truck Sonoma 2WD 4.3L TBI 6cyl
165432 is the order distributor rotates clockwise