I know this is a little old, but it might help.....
Good luck

Customer Satisfaction Program -- Engine Coolant Leak #03034 - (07/07/2003)

03034 - Engine Coolant Leak

All 2000-2002 and Certain 2003 Chevrolet Impala, Monte Carlo; Pontiac Grand
Prix, Bonneville; and Buick Regal, LeSabre, Park Avenue Equipped with 3.8L
V6 Engine (RPO L36 - VIN Code K)

THIS RECALL IS IN EFFECT UNTIL JULY 31, 2005.

Condition
General Motors has decided that all 2000-2002 and certain 2003 Chevrolet
Impala, Monte Carlo; Pontiac Grand Prix, Bonneville; and Buick Regal,
LeSabre, Park Avenue model vehicles equipped with 3.8L (RPO L36 - VIN Code
K) engines, may have a condition in which engine coolant may leak at the
upper intake manifold throttle body gasket, or at the upper intake manifold
to lower intake manifold gasket. This condition may result in a low engine
coolant level and higher engine operating temperatures.

Correction
Dealers are to replace the three throttle body fastener nuts and add cooling
system sealant to the radiator tank.

Vehicles Involved
Involved are all 2000-2002 Chevrolet Impala, Monte Carlo; Pontiac Grand
Prix, Bonneville; and Buick Regal, LeSabre, Park Avenue model vehicles
equipped with 3.8L (RPO L36 - VIN Code K) engines and built within these VIN
breakpoints:

Note: VIN numbers were not provided

Important
Dealers should confirm vehicle eligibility through GMVIS (GM Vehicle Inquiry
System) or GM Access Screen (Canada only) or DCS Screen 445 (IPC only) prior
to beginning program repairs.  [Not all vehicles within the above
breakpoints may be involved.]

Computer listings containing the complete Vehicle Identification Number,
customer name and address data have been prepared, and are being furnished
to involved dealers with the program bulletin.  The customer name and
address data furnished will enable dealers to follow up with customers
involved in this program.  Any dealer not receiving a computer listing with
the program bulletin has no involved vehicles currently assigned.  These
dealer listings may contain customer names and addresses obtained from Motor
Vehicle Registration Records.  The use of such motor vehicle registration
data for any other purpose is a violation of law in several
states/provinces/countries.  Accordingly, you are urged to limit the use of
this listing to the follow-up necessary to complete this program.

Parts Information
Parts required to complete this program are to be obtained from General
Motors Service Parts Operations (GMSPO). Please refer to your "involved
vehicles listing" before ordering requirements.  Normal orders should be
placed on a DRO = Daily Replenishment Order.  In an emergency situation,
parts should be ordered on a CSO = Customer Special Order.

Service Procedure
Important
All "W" cars and "H" cars require a total of 16 grams of coolant sealant
pellets per vehicle engine cooling system.  The Buick Park Avenue ("C" car)
requires 20 grams of coolant sealant pellets per vehicle engine cooling
system.

Remove the engine intake air snorkel assembly from the throttle body (t/b)
and air box.
Remove the bolt from the t/b support bracket at the throttle body.
Loosen the bolt from the t/b support bracket at the cylinder head and move
the t/b support bracket away from the throttle body.
Remove one of the 3 t/b nuts.
Apply thread locker (p/n 12345382 US / 10953489 Canada) to the stud.
Install a new t/b spring nut (p/n 11517293) and tighten finger tight.
Repeat Steps 5 through 7 for remaining t/b nuts.
Tighten the 3 t/b spring nuts.  Tighten
Tighten the spring nuts to 10 N?m (89 lb in).
Reinstall the t/b support bracket into position.
Reinstall and tighten the t/b support bracket.  Tighten
Tighten the bracket to 10 N?m (89 lb in).
Tighten the t/b support bracket bolt at the cylinder head.  Tighten
Tighten the bolt to 10 N?m (89 lb in).

Caution
To avoid being burned, do not remove the radiator cap or surge tank cap
while the engine is hot.  The cooling system will release scalding fluid and
steam under pressure if radiator cap or surge tank cap is removed while the
engine and radiator are still hot.

Remove the vehicle radiator cap.
Remove and appropriate quantity of coolant pellets from the package and
pulverize the pellets in a plastic bag.  The Park Avenue cooling system
requires 20 grams of pellets and all the other vehicle cooling systems
require 16 grams of pellets.
Install the crushed pellets through the radiator neck after adjusting the
coolant level to accommodate the pellets.
Add coolant as required and reinstall the radiator cap.
Install the GM Identification Label.

Identification Label
Place a Recall Identification Label on each vehicle corrected in accordance
with the instructions outlined in this Product Recall Bulletin.  Each label
provides a space to include the recall number and the five (5) digit dealer
code of the dealer performing the recall service.  This information may be
inserted with a typewriter or a ball point pen.
Put the Recall Identification Label on a clean and dry surface of the
radiator core support in an area that will be visible to people servicing
the vehicle.  For US and IPC -- When installing the Recall Identification
Label, be sure to pull the tab to allow the adhesion of the clear protective
covering.  Additional Recall Identification Labels for US dealers can be
obtained from Dealer Support Materials by either ordering on the web from
DWD Store, gm-dealerworld.com, or calling 1-866-700-0001 (Monday-Friday,
8:00 am to 5:00 pm EST).  Ask for Item Number S-1015 when ordering.
Additional Recall Identification Labels for IPC dealers can be obtained from
your Regional Marketing Office.  For Canada - Additional Recall
Identification Labels for Canadian dealers can be obtained from DGN by
calling 1-800-668-5539 (Monday-Friday, 8:00 a.m. to 5:00 p.m. EST).  Ask for
Item Number GMP 91 when ordering.

Customer Reimbursement - For US
All customer requests for reimbursement of previously paid coolant leaks
that were repaired by replacing the upper intake manifold/gasket, throttle
body nuts, or throttle body gasket will be handled by the Customer
Assistance Center, not by dealers.  A General Motors Product Program
Customer Reimbursement Procedure Form is included with the customer letter.

Important
Refer to GM Service Policies and Procedures Manual, section 6.1.12 for
specific procedures regarding customer reimbursement and the form.

Customer Reimbursement - For Canada
All customer requests for reimbursement of previously paid coolant leaks
that were repaired by replacing the upper intake manifold/gasket, throttle
body nuts or throttle body gasket are to be submitted by July 31, 2004.All
reasonable customer paid receipts should be considered for reimbursement.
The amount to be reimbursed will be limited to the amount the repair would
have cost if completed by an authorized General Motors dealer.  When a
customer requests reimbursement, they must provide the following:
Proof of ownership at the time of repair.
Original paid receipt confirming the amount of unreimbursed repair
expense(s) that were not reimbursed, a description of the repair, and the
person or entity performing the repair.
Claims for customer reimbursement on previously paid repairs are to be
submitted as required by WINS.

Important
Refer to the GM service policies and procedures manual, section 1.6.2, for
specific procedures regarding customer reimbursement verification.

Courtesy Transportation
The General Motors Courtesy Transportation program is intended to minimize
customer inconvenience when a vehicle requires a repair that is covered by
the New Vehicle Limited Warranty.  The availability of courtesy
transportation to customers whose vehicles are within the warranty coverage
period and involved in a product recall is very important in maintaining
customer satisfaction.  Dealers are to ensure that these customers
understand that shuttle service or some other form of courtesy
transportation is available and will be provided at no charge.  Dealers
should refer to the General Motors Service Policies and Procedures Manual
for Courtesy Transportation guidelines.

Claim Information
Submit a Product Program Claim with the information indicated below.

Note: No other information was included.

END OF BULLETIN

Steven did me a HUGE favor by sending the above info in an e-mail.  I just
cut and pasted it and didn't have to re-type everything.

Steven also sent me a list of the affected VINs:
2000 Chevy MC Y9100297-Y9385464
2000 Chevy Impala Y9100297-Y9385464
2000 Pontiac GP YF100033-YF353313
2000 Buick Regal Y1100004-Y1304443

Something looks a little strange with these numbers since the VINs are "Y"
and the bulletin talks about "K."  My car falls in the breakpoints, but it
has a "K" not a "Y."  Anyone else received a letter or have more info?

At least two class action lawsuits have been filed.